diff --git a/src/BambuStudio.cpp b/src/BambuStudio.cpp
index 97abadba8..0217cf5d2 100644
--- a/src/BambuStudio.cpp
+++ b/src/BambuStudio.cpp
@@ -4422,6 +4422,10 @@ int CLI::run(int argc, char **argv)
     oriented_or_arranged |= need_arrange;
 
     BOOST_LOG_TRIVIAL(info) << boost::format("before arrange, need_arrange=%1%, duplicate_count %2%, filament_color_changed %3%")%need_arrange %duplicate_count %filament_color_changed;
+    // if (!assemble_plate_info_list.empty() || need_arrange)
+    BOOST_LOG_TRIVIAL(debug) << "filament_count: " << filament_count;
+    Model::setExtruderParams(m_print_config, filament_count);
+
     if (need_arrange || filament_color_changed)
     {
         for (int index = 0; index < partplate_list.get_plate_count(); index ++)
@@ -4589,7 +4593,7 @@ int CLI::run(int argc, char **argv)
                     BOOST_LOG_TRIVIAL(info) << "Arrange full params: " << arrange_cfg.to_json();
                     BOOST_LOG_TRIVIAL(info) << boost::format("arrange: items selected before arranging: %1%") % selected.size();
                     for (auto item : selected)
-                        BOOST_LOG_TRIVIAL(trace) << item.name << ", extruder: " << item.extrude_ids.back() << ", bed: " << item.bed_idx
+                        BOOST_LOG_TRIVIAL(trace) << item.name << ", extruder: " << item.extrude_id_filament_types.begin()->first << ", bed: " << item.bed_idx
                         << ", trans: " << item.translation.transpose();
                     BOOST_LOG_TRIVIAL(info) << boost::format("arrange: items unselected before arranging: %1%") % unselected.size();
                     for (auto item : unselected)
@@ -5001,12 +5005,9 @@ int CLI::run(int argc, char **argv)
                     BOOST_LOG_TRIVIAL(debug) << "arrange bedpts:" << beds[0].transpose() << ", " << beds[1].transpose() << ", " << beds[2].transpose() << ", " << beds[3].transpose();
                     BOOST_LOG_TRIVIAL(info)<< "Arrange full params: "<< arrange_cfg.to_json();
                     BOOST_LOG_TRIVIAL(info) << boost::format("arrange: items selected before arranging: %1%")%selected.size();
-                    for (auto item : selected)
-                        BOOST_LOG_TRIVIAL(trace) << item.name << ", extruder: " << item.extrude_ids.back() << ", bed: " << item.bed_idx
-                                                << ", trans: " << item.translation.transpose();
+                    for (auto item : selected) BOOST_LOG_TRIVIAL(trace) << item.name << ", bed: " << item.bed_idx << ", trans: " << item.translation.transpose();
                     BOOST_LOG_TRIVIAL(info) << boost::format("arrange: items unselected before arranging: %1%") % unselected.size();
-                    for (auto item : unselected)
-                        BOOST_LOG_TRIVIAL(trace) << item.name << ", bed: " << item.bed_idx << ", trans: " << item.translation.transpose();
+                    for (auto item : unselected) BOOST_LOG_TRIVIAL(trace) << item.name << ", bed: " << item.bed_idx << ", trans: " << item.translation.transpose();
                 }
                 arrange_cfg.progressind= [](unsigned st, std::string str = "") {
                     //boost::nowide::cout << "st=" << st << ", " << str << std::endl;
diff --git a/src/libnest2d/include/libnest2d/geometry_traits.hpp b/src/libnest2d/include/libnest2d/geometry_traits.hpp
index a4767c7f7..f9e32b25d 100644
--- a/src/libnest2d/include/libnest2d/geometry_traits.hpp
+++ b/src/libnest2d/include/libnest2d/geometry_traits.hpp
@@ -656,7 +656,7 @@ inline std::string toString(const S& /*sh*/)
 }
 
 template<Formats, class S>
-inline std::string serialize(const S& /*sh*/, double /*scale*/=1, std::string fill = "none", std::string stroke = "black", float stroke_width = 1)
+inline std::string serialize(const S & /*sh*/, const std::string &name = "", double /*scale*/ = 1, std::string fill = "none", std::string stroke = "black", float stroke_width = 1)
 {
     static_assert(always_false<S>::value,
                   "shapelike::serialize() unimplemented!");
diff --git a/src/libnest2d/include/libnest2d/nester.hpp b/src/libnest2d/include/libnest2d/nester.hpp
index 68141c9b4..b35e416e7 100644
--- a/src/libnest2d/include/libnest2d/nester.hpp
+++ b/src/libnest2d/include/libnest2d/nester.hpp
@@ -75,8 +75,7 @@ class _Item {
 
 public:
     int itemid_{ 0 };
-    std::vector<int> extrude_ids;
-    std::vector<std::string> filament_types{};        /// filament type for different material judge
+    std::map<int, std::string> extrude_id_filament_types; // extrude id to filament type
     int filament_temp_type = -1; // -1 means unset. otherwise should be one of FilamentTempType ie {0,1,2}
     double height{ 0 };
     double print_temp{ 0 };
@@ -86,7 +85,8 @@ public:
     //BBS: virtual object to mark unprintable region on heatbed
     bool is_virt_object{ false };
     bool is_wipe_tower{ false };
-    bool has_tried_with_excluded{ false };
+    bool is_extrusion_cali_object{ false };
+    bool has_tried_without_extrusion_cali_obj{ false };
     std::vector<double> allowed_rotations{0.};
 
     /// The type of the shape which was handed over as the template argument.
diff --git a/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp b/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp
index bf333909e..c95aa2bb2 100644
--- a/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp
+++ b/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp
@@ -18,8 +18,8 @@
 #include "placer_boilerplate.hpp"
 
 // temporary
-//#include "../tools/svgtools.hpp"
-//#include <iomanip> // setprecision
+#include "../tools/svgtools.hpp"
+#include <iomanip> // setprecision
 
 #include <libnest2d/parallel.hpp>
 
@@ -690,6 +690,18 @@ private:
 
     using Edges = EdgeCache<RawShape>;
 
+    // item won't overlap with virtual objects if it's inside or touches NFP
+    // @return 1 if current item overlaps with virtual objects, 0 otherwise
+    bool overlapWithVirtObject(const Item& item, const Box& binbb){
+        if (items_.empty()) return 0;
+        Shapes nfps   = calcnfp(item, binbb, Lvl<MaxNfpLevel::value>());
+        auto v = item.referenceVertex();
+        for (const RawShape &nfp : nfps) {
+            if (sl::isInside(v, nfp) || sl::touches(v, nfp)) { return false; }
+        }
+        return true;
+    };
+
     template<class Range = ConstItemRange<typename Base::DefaultIter>>
     PackResult _trypack(Item& item, const Range& remaining = Range()) {
 
@@ -757,19 +769,13 @@ private:
             };
         }
 
-        bool first_object = std::all_of(items_.begin(), items_.end(), [&](const Item &rawShape) { return rawShape.is_virt_object && !rawShape.is_wipe_tower; });
+        for (auto &it : items_) {
+            config_.progressFunc((boost::format("_trypack: plate: %4%, existing object: %1%, pos: (%2%, %3%)") % it.get().name % unscale_(it.get().translation()[0]) %
+                                  unscale_(it.get().translation()[1]) % plateID())
+                                     .str());
+        }
 
-        // item won't overlap with virtual objects if it's inside or touches NFP
-        // @return 1 if current item overlaps with virtual objects, 0 otherwise
-        auto overlapWithVirtObject = [&]() -> double {
-            if (items_.empty()) return 0;
-            nfps   = calcnfp(item, binbb, Lvl<MaxNfpLevel::value>());
-            auto v = item.referenceVertex();
-            for (const RawShape &nfp : nfps) {
-                if (sl::isInside(v, nfp) || sl::touches(v, nfp)) { return 0; }
-            }
-            return 1;
-        };
+        bool first_object = std::all_of(items_.begin(), items_.end(), [&](const Item &rawShape) { return rawShape.is_virt_object && !rawShape.is_wipe_tower; });
 
         if (first_object) {
             setInitialPosition(item);
@@ -780,21 +786,23 @@ private:
             // try normal inflation first, then 0 inflation if not fit. See STUDIO-5566.
             // Note for by-object printing, bed is expanded by -config_.bed_shrink.x().
             Coord inflation_back = item.inflation();
-            Coord inflations[2]={inflation_back, std::abs(config_.bed_shrink.x())};
+            Coord inflations[2]={inflation_back, 0};
             for (size_t i = 0; i < 2; i++) {
                 item.inflation(inflations[i]);
                 for (auto rot : item.allowed_rotations) {
                     item.translation(initial_tr);
                     item.rotation(initial_rot + rot);
                     setInitialPosition(item);
-                    double of = overfit(item.transformedShape(), bin_);
-                    if (of + overlapWithVirtObject() < best_overfit) {
-                        best_overfit = of;
-                        best_tr = item.translation();
-                        best_rot = item.rotation();
-                        if (best_overfit <= 0) {
-                            config_.progressFunc("First object can fit with rot="+std::to_string(rot));
-                            break;
+                    if (!overlapWithVirtObject(item, binbb)) {
+                        double of = overfit(item.transformedShape(), bin_);
+                        if (of < best_overfit) {
+                            best_overfit = of;
+                            best_tr      = item.translation();
+                            best_rot     = item.rotation();
+                            if (best_overfit <= 0) {
+                                config_.progressFunc("First object " + item.name + " can fit with rot=" + std::to_string(rot));
+                                break;
+                            }
                         }
                     }
                 }
@@ -1005,41 +1013,7 @@ private:
             item.rotation(final_rot);
         }
 
-#ifdef SVGTOOLS_HPP
-        if (config_.save_svg) {
-            svg::SVGWriter<RawShape> svgwriter;
-            Box                      binbb2(binbb.width() * 2, binbb.height() * 2, binbb.center()); // expand bbox to allow object be drawed outside
-            svgwriter.setSize(binbb2);
-            svgwriter.conf_.x0 = binbb.width();
-            svgwriter.conf_.y0 = -binbb.height() / 2; // origin is top left corner
-            svgwriter.add_comment("bed");
-            svgwriter.writeShape(box2RawShape(binbb), "none", "black");
-            svgwriter.add_comment("nfps");
-            for (int i = 0; i < nfps.size(); i++) svgwriter.writeShape(nfps[i], "none", "blue");
-            for (int i = 0; i < items_.size(); i++) {
-                svgwriter.add_comment(items_[i].get().name);
-                svgwriter.writeItem(items_[i], "none", "black");
-            }
-            svgwriter.add_comment("merged_pile_");
-            for (int i = 0; i < merged_pile_.size(); i++) svgwriter.writeShape(merged_pile_[i], "none", "yellow");
-            svgwriter.add_comment("current item");
-            svgwriter.writeItem(item, "red", "red", 2);
-
-            std::stringstream ss;
-            ss.setf(std::ios::fixed | std::ios::showpoint);
-            ss.precision(1);
-            ss << "t=" << round(item.translation().x() / 1e6) << ","
-               << round(item.translation().y() / 1e6)
-               //<< "-rot=" << round(item.rotation().toDegrees())
-               << "-sco=" << round(global_score);
-            svgwriter.draw_text(20, 20, ss.str(), "blue", 20);
-            ss.str("");
-            ss << "items.size=" << items_.size() << "-merged_pile.size=" << merged_pile_.size();
-            svgwriter.draw_text(20, 40, ss.str(), "blue", 20);
-            svgwriter.save(boost::filesystem::path("C:/Users/arthur.tang/AppData/Roaming/BambuStudioInternal/SVG") /
-                           ("nfpplacer_" + std::to_string(plate_id) + "_" + ss.str() + "_" + item.name + ".svg"));
-        }
-#endif
+        if (config_.save_svg) saveSVG(binbb, nfps, item, global_score, can_pack);
 
         if(can_pack) {
             ret = PackResult(item);
@@ -1068,26 +1042,18 @@ private:
 
         auto   binbb  = sl::boundingBox(bin_);
 
-        for (auto &it : items_) { config_.progressFunc("existing object: " + it.get().name); }
+        for (auto &it : items_) {
+            config_.progressFunc((boost::format("_trypack_with_original_pos: plate: %4%, existing object: %1%, pos: (%2%, %3%)") % it.get().name % unscale_(it.get().translation()[0]) %
+                                  unscale_(it.get().translation()[1]) % plateID())
+                                     .str());
+        }
        
-        // item won't overlap with virtual objects if it's inside or touches NFP
-        // @return 1 if current item overlaps with virtual objects, 0 otherwise
-        auto overlapWithVirtObject = [&]() -> double {
-            if (items_.empty()) return 0;
-            nfps   = calcnfp(item, binbb, Lvl<MaxNfpLevel::value>());
-            auto v = item.referenceVertex();
-            for (const RawShape &nfp : nfps) {
-                if (sl::isInside(v, nfp) || sl::touches(v, nfp)) { return 0; }
-            }
-            return 1;
-        };
-
         {
             for (auto rot : item.allowed_rotations) {
                 item.translation(initial_tr);
                 item.rotation(initial_rot + rot);
 
-                if (0==overlapWithVirtObject()) {
+                if (!overlapWithVirtObject(item, binbb)) {
                     can_pack     = true;
                     final_tr     = initial_tr;
                     final_rot    = initial_rot + rot;
@@ -1100,46 +1066,13 @@ private:
             item.rotation(final_rot);
         }
 
-#ifdef SVGTOOLS_HPP
-        if (config_.save_svg) {
-            svg::SVGWriter<RawShape> svgwriter;
-            Box                      binbb2(binbb.width() * 2, binbb.height() * 2, binbb.center()); // expand bbox to allow object be drawed outside
-            svgwriter.setSize(binbb2);
-            svgwriter.conf_.x0 = binbb.width();
-            svgwriter.conf_.y0 = -binbb.height() / 2; // origin is top left corner
-            svgwriter.add_comment("bed");
-            svgwriter.writeShape(box2RawShape(binbb), "none", "black");
-            svgwriter.add_comment("nfps");
-            for (int i = 0; i < nfps.size(); i++) svgwriter.writeShape(nfps[i], "none", "blue");
-            for (int i = 0; i < items_.size(); i++) {
-                svgwriter.add_comment(items_[i].get().name);
-                svgwriter.writeItem(items_[i], "none", "black");
-            }
-            svgwriter.add_comment("merged_pile_");
-            for (int i = 0; i < merged_pile_.size(); i++) svgwriter.writeShape(merged_pile_[i], "none", "yellow");
-            svgwriter.add_comment("current item");
-            svgwriter.writeItem(item, "red", "red", 2);
-
-            std::stringstream ss;
-            ss.setf(std::ios::fixed | std::ios::showpoint);
-            ss.precision(1);
-            ss << "t=" << round(item.translation().x() / 1e6) << ","
-               << round(item.translation().y() / 1e6)
-               //<< "-rot=" << round(item.rotation().toDegrees())
-               << "-sco=" << round(global_score);
-            svgwriter.draw_text(20, 20, ss.str(), "blue", 20);
-            ss.str("");
-            ss << "items.size=" << items_.size() << "-merged_pile.size=" << merged_pile_.size();
-            svgwriter.draw_text(20, 40, ss.str(), "blue", 20);
-            svgwriter.save(boost::filesystem::path("C:/Users/arthur.tang/AppData/Roaming/BambuStudioInternal/SVG") /
-                           ("nfpplacer_" + std::to_string(plate_id) + "_" + ss.str() + "_" + item.name + ".svg"));
-        }
-#endif
+        if (config_.save_svg) saveSVG(binbb, nfps, item, global_score, can_pack);
 
         if (can_pack) {
             ret        = PackResult(item);
             ret.score_ = global_score;
             // merged_pile_ = nfp::merge(merged_pile_, item.transformedShape());
+            config_.progressFunc((boost::format("_trypack_with_original_pos: item %1% can pack") % item.name).str());
         } else {
             ret = PackResult(best_overfit);
         }
@@ -1147,6 +1080,33 @@ private:
         return ret;
     }
 
+    void saveSVG(Box &binbb, Shapes &nfps, Item &item, double global_score, bool can_pack)
+    {
+        svg::SVGWriter<RawShape> svgwriter;
+        Box                      binbb2(binbb.width() * 2, binbb.height() * 2, binbb.center()); // expand bbox to allow object be drawed outside
+        svgwriter.setSize(binbb2);
+        svgwriter.conf_.x0 = binbb.width();
+        svgwriter.conf_.y0 = -binbb.height() / 2; // origin is top left corner
+        svgwriter.writeShape(box2RawShape(binbb), "bed", "none", "black");
+        for (int i = 0; i < nfps.size(); i++) svgwriter.writeShape(nfps[i], "nfp_" + std::to_string(i), "none", "blue", 0.2);
+        for (int i = 0; i < items_.size(); i++) { svgwriter.writeItem(items_[i], items_[i].get().name, "none", "black", 0.2); }
+        for (int i = 0; i < merged_pile_.size(); i++) svgwriter.writeShape(merged_pile_[i], "merged_pile_" + std::to_string(i), "none", "yellow", 0.2);
+        svgwriter.writeItem(item, item.name, "red", "red", 0.3);
+
+        std::stringstream ss;
+        ss.setf(std::ios::fixed | std::ios::showpoint);
+        ss.precision(1);
+        ss << "t=" << round(item.translation().x() / 1e6) << ","
+           << round(item.translation().y() / 1e6)
+           //<< "-rot=" << round(item.rotation().toDegrees())
+           << "-sco=" << round(global_score);
+        svgwriter.draw_text(20, 20, ss.str(), "blue", 10);
+        ss.str("");
+        ss << "items.size=" << items_.size() << "-merged_pile.size=" << merged_pile_.size();
+        svgwriter.draw_text(20, 40, ss.str(), "blue", 10);
+        svgwriter.save(boost::filesystem::path("SVG") / ("plate_" + std::to_string(plate_id) + "_" + ss.str() + "_" + item.name + "_canPack=" + std::to_string(can_pack) + ".svg"));
+    }
+
     RawShape box2RawShape(Box& bbin)
     {
         RawShape binrsh;
@@ -1260,17 +1220,7 @@ private:
         auto d = cb - ci;
 
         // BBS make sure the item won't clash with excluded regions
-        // do we have wipe tower after arranging?
         size_t n_objs = 0;
-        std::set<int> extruders;
-        for (const Item& item : items_) {
-            if (!item.is_virt_object) {
-                extruders.insert(item.extrude_ids.begin(), item.extrude_ids.end());
-                n_objs++;
-            }
-        }
-        bool need_wipe_tower = extruders.size() > 1;
-
         std::vector<RawShape> objs,excludes;
         for (Item &item : items_) {
             if (item.isFixed()) {
diff --git a/src/libnest2d/include/libnest2d/selections/firstfit.hpp b/src/libnest2d/include/libnest2d/selections/firstfit.hpp
index 532419e07..9ce68e7ee 100644
--- a/src/libnest2d/include/libnest2d/selections/firstfit.hpp
+++ b/src/libnest2d/include/libnest2d/selections/firstfit.hpp
@@ -41,7 +41,7 @@ public:
 
         std::vector<Placer> placers;
         placers.reserve(last-first);
-        
+
         typename Base::PackGroup fixed_bins;
         std::for_each(first, last, [this, &fixed_bins](Item& itm) {
             if (itm.isFixed()) {
@@ -67,7 +67,7 @@ public:
         std::for_each(first, last, [this,&svgwriter](Item &itm) { svgwriter.writeShape(itm, "none", "blue"); });
         svgwriter.save(boost::filesystem::path("SVG") / "all_items.svg");
 #endif
-        
+
         std::function<bool(Item& i1, Item& i2)> sortfunc;
         if (pconfig.sortfunc)
             sortfunc = pconfig.sortfunc;
@@ -93,6 +93,21 @@ public:
             if (this->unfitindicator_)
                 this->unfitindicator_(ss.str());
         }
+        // debug: write down fixed items
+        for (size_t i = 0; i < fixed_bins.size(); i++) {
+            if (fixed_bins[i].empty())
+                continue;
+            std::stringstream ss;
+            ss << "fixed bin " << i << ": ";
+            for (auto it = fixed_bins[i].begin(); it != fixed_bins[i].end(); ++it) {
+                ss << it->get().name << ", p=" << it->get().priority() << ", bed_temp=" << it->get().bed_temp << ", height=" << it->get().height
+                   << ", area=" << it->get().area() << ", allowed_rotations=";
+                for(auto r: it->get().allowed_rotations) ss << r << ", ";
+                ss << ";   ";
+            }
+            if (this->unfitindicator_)
+                this->unfitindicator_(ss.str());
+        }
 
         int item_id = 0;
         auto makeProgress = [this, &item_id](Placer &placer, size_t bin_idx) {
@@ -102,8 +117,8 @@ public:
         };
 
         auto& cancelled = this->stopcond_;
-        
-        this->template remove_unpackable_items<Placer>(store_, bin, pconfig);
+
+        //this->template remove_unpackable_items<Placer>(store_, bin, pconfig);
 
         for (auto it = store_.begin(); it != store_.end() && !cancelled(); ++it) {
             // skip unpackable item
@@ -116,8 +131,8 @@ public:
             double score_all_plates = 0, score_all_plates_best = std::numeric_limits<double>::max();
             typename Placer::PackResult result, result_best, result_firstfit;
             int j = 0;
-            while(!was_packed && !cancelled()) {
-                for(; j < placers.size() && !was_packed && !cancelled(); j++) {
+            while (!was_packed && !cancelled() && placers.size() <= MAX_NUM_PLATES) {
+                for(; j < placers.size() && !was_packed && !cancelled() && j<MAX_NUM_PLATES; j++) {
                     if (it->get().is_wipe_tower && it->get().binId() != placers[j].plateID()) {
                         if (this->unfitindicator_)
                             this->unfitindicator_(it->get().name + " cant be placed in plate_id=" + std::to_string(j) + "/" + std::to_string(placers.size()) + ", continue to next plate");
@@ -127,7 +142,10 @@ public:
                     score = result.score();
                     score_all_plates = score;
                     for (int i = 0; i < placers.size(); i++) { score_all_plates += placers[i].score();}
-                    if (this->unfitindicator_) this->unfitindicator_(it->get().name + " bed_id="+std::to_string(j) + ",score=" + std::to_string(score)+", score_all_plates="+std::to_string(score_all_plates));
+                    if (this->unfitindicator_)
+                        this->unfitindicator_((boost::format("item %1% bed_id=%2%, score=%3%, score_all_plates=%4%, pos=(%5%, %6%)") % it->get().name % j % score %
+                                               score_all_plates % unscale_(it->get().translation()[0]) % unscale_(it->get().translation()[1]))
+                                                  .str());
 
                     if(score >= 0 && score < LARGE_COST_TO_REJECT) {
                         if (bed_id_firstfit == -1) {
@@ -167,42 +185,42 @@ public:
                     makeProgress(placers[j], j);
                 }
 
-                if (was_packed && it->get().has_tried_with_excluded) {
-                    placers[j].clearItems([](const Item &itm) { return itm.isFixed() && !itm.is_wipe_tower; });
-                    if (fixed_bins.size() >= placers.size())
-                        placers[j].preload(fixed_bins[placers.size() - 1]);
-                }
-                bool placer_not_packed = !was_packed && !placers.empty() && j == placers.size() && placers[j - 1].getPackedSize() == 0; // large item is not placed into the bin
+                // if the object can't be packed, try to pack it without extrusion calibration object
+                bool placer_not_packed = !was_packed && j > 0 && j == placers.size() && placers[j - 1].getPackedSize() == 0; // large item is not placed into the bin
                 if (placer_not_packed) {
-                    if (it->get().has_tried_with_excluded == false) {
-                        it->get().has_tried_with_excluded = true;
-                        placers[j - 1].clearItems([](const Item &itm) { return itm.isFixed()&&!itm.is_wipe_tower; });
-                        placers[j - 1].preload(pconfig.m_excluded_items);
+                    if (it->get().has_tried_without_extrusion_cali_obj == false) {
+                        it->get().has_tried_without_extrusion_cali_obj = true;
+                        placers[j - 1].clearItems([](const Item &itm) { return itm.is_extrusion_cali_object; });
                         j = j - 1;
                         continue;
-                    } else {
-                        placers[j - 1].clearItems([](const Item &itm) { return itm.isFixed() && !itm.is_wipe_tower; });
-                        placers[j - 1].preload(fixed_bins[placers.size() - 1]);
                     }
                 }
 
                 if(!was_packed){
                     if (this->unfitindicator_ && !placers.empty())
-                        this->unfitindicator_(it->get().name + " not fit! height=" +std::to_string(it->get().height)
-                            + " ,plate_id=" + std::to_string(j)
-                            + ", score=" + std::to_string(score)
-                            + ", best_bed_id=" + std::to_string(best_bed_id)
-                            + ", score_all_plates=" + std::to_string(score_all_plates)
-                            +", item.bed_id=" + std::to_string(it->get().binId()));
-
-                    placers.emplace_back(bin);
-                    placers.back().plateID(placers.size() - 1);
-                    placers.back().configure(pconfig);
-                    if (fixed_bins.size() >= placers.size())
-                        placers.back().preload(fixed_bins[placers.size() - 1]);
-                    //placers.back().preload(pconfig.m_excluded_items);
-                    packed_bins_.emplace_back();
-                    j = placers.size() - 1;
+                        this->unfitindicator_(it->get().name + " not fit! plate_id=" + std::to_string(placers.back().plateID()) + ", score=" + std::to_string(score) +
+                                              ", best_bed_id=" + std::to_string(best_bed_id) + ", score_all_plates=" + std::to_string(score_all_plates) +
+                                              ", item.bed_id=" + std::to_string(it->get().binId()));
+                    if (!placers.empty() && placers.back().getItems().empty()) {
+                        it->get().binId(BIN_ID_UNFIT);
+                        if (this->unfitindicator_) this->unfitindicator_(it->get().name + " can't fit into a new bin. Can't fit!");
+                        // remove the last empty placer to force next item to be fit in existing plates first
+                        if (placers.size() > 1) placers.pop_back();
+                        break;
+                    }
+                    if (placers.size() < MAX_NUM_PLATES) {
+                        placers.emplace_back(bin);
+                        placers.back().plateID(placers.size() - 1);
+                        placers.back().configure(pconfig);
+                        if (fixed_bins.size() >= placers.size()) placers.back().preload(fixed_bins[placers.size() - 1]);
+                        // placers.back().preload(pconfig.m_excluded_items);
+                        packed_bins_.emplace_back();
+                        j = placers.size() - 1;
+                    } else {
+                        it->get().binId(BIN_ID_UNFIT);
+                        if (this->unfitindicator_) this->unfitindicator_(it->get().name + " can't fit into any bin. Can't fit!");
+                        break;
+                    }
                 }
             }
         }
diff --git a/src/libnest2d/include/libnest2d/utils/boost_alg.hpp b/src/libnest2d/include/libnest2d/utils/boost_alg.hpp
index c98161f17..960a948de 100644
--- a/src/libnest2d/include/libnest2d/utils/boost_alg.hpp
+++ b/src/libnest2d/include/libnest2d/utils/boost_alg.hpp
@@ -443,7 +443,7 @@ inline void offset(PolygonImpl& sh, bp2d::Coord distance)
 
 #ifndef DISABLE_BOOST_SERIALIZE
 template<> inline std::string serialize<libnest2d::Formats::SVG>(
-        const PolygonImpl& sh, double scale, std::string fill, std::string stroke, float stroke_width)
+        const PolygonImpl& sh, const std::string& name, double scale, std::string fill, std::string stroke, float stroke_width)
 {
     std::stringstream ss;
     std::string style = "fill: "+fill+"; stroke: "+stroke+"; stroke-width: "+std::to_string(stroke_width)+"px; ";
@@ -478,7 +478,14 @@ template<> inline std::string serialize<libnest2d::Formats::SVG>(
 
     ss << svg_data << std::endl;
 
-    return ss.str();
+    std::string svg_content = ss.str();
+    if (!name.empty()) {
+        size_t pos = svg_content.find_first_of("<g ");
+        if (pos != std::string::npos) { svg_content.insert(pos + 3, "id=\"" + name + "\" ");
+        }
+    }
+
+    return svg_content;
 }
 #endif
 
diff --git a/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp b/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp
index e703a3801..a21bdf55b 100644
--- a/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp
+++ b/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp
@@ -38,6 +38,8 @@ public:
     
     inline Radians angleToX() const {
         double ret = std::atan2(getY(axis_), getX(axis_));
+        // horizontal or vertical up-right rectangles are not distinguished, but we need to get the horizontal one
+        if (abs(ret) < EPSILON && abs(bottom_) < abs(right_)) ret += Pi / 2;
         auto s = std::signbit(ret);
         if(s) ret += Pi_2;
         return -ret;
diff --git a/src/libnest2d/tools/svgtools.hpp b/src/libnest2d/tools/svgtools.hpp
index 4497b2b3e..80211bc07 100644
--- a/src/libnest2d/tools/svgtools.hpp
+++ b/src/libnest2d/tools/svgtools.hpp
@@ -31,7 +31,7 @@ public:
         double        x0, y0;
         Config():
             origo_location(BOTTOMLEFT), mm_in_coord_units(1000000),
-            width(500), height(500),x0(100) {}
+            width(500), height(500),x0(100),y0(0) {}
 
     };
 
@@ -47,14 +47,15 @@ public:
 
     void setSize(const Box &box)    {
         conf_.x0     = box.width() / 5;
-        conf_.x0     = box.height() / 5;
+        conf_.y0     = box.height() / 5;
         conf_.height = static_cast<double>(box.height() + conf_.y0*2) /
                 conf_.mm_in_coord_units;
         conf_.width  = static_cast<double>(box.width() + conf_.x0*2) /
                 conf_.mm_in_coord_units;
     }
     
-    void writeShape(RawShape tsh, std::string fill = "none", std::string stroke = "black", float stroke_width = 1) {
+    void writeShape(RawShape tsh, const std::string &name = "", std::string fill = "none", std::string stroke = "black", float stroke_width = 1)
+    {
         if(svg_layers_.empty()) addLayer();
         if(conf_.origo_location == BOTTOMLEFT) {
             auto d = static_cast<Coord>(
@@ -74,13 +75,14 @@ public:
                 }
         }
         currentLayer() +=
-            shapelike::serialize<Formats::SVG>(tsh,
+            shapelike::serialize<Formats::SVG>(tsh, name,
                                                1.0 / conf_.mm_in_coord_units, fill, stroke, stroke_width) +
             "\n";
     }
 
-    void writeItem(const Item& item, std::string fill = "none", std::string stroke = "black", float stroke_width = 1) {
-        writeShape(item.transformedShape(), fill, stroke, stroke_width);
+    void writeItem(const Item &item, const std::string &name = "", std::string fill = "none", std::string stroke = "black", float stroke_width = 1)
+    {
+        writeShape(item.transformedShape(), name, fill, stroke, stroke_width);
     }
 
     void writePackGroup(const PackGroup& result) {
@@ -97,7 +99,7 @@ public:
         auto it = from;
         PackGroup pg;
         while(it != to) {
-            if(it->binId() == BIN_ID_UNSET) continue;
+            if (it->binId() == BIN_ID_UNFIT) continue;
             while(pg.size() <= size_t(it->binId())) pg.emplace_back();
             pg[it->binId()].emplace_back(*it);
             ++it;
@@ -159,6 +161,8 @@ public:
         currentLayer() += "<!-- " + comment + " -->\n";
     }
 
+    void clear() { svg_layers_.clear(); }
+
 private:
 
     std::string& currentLayer() { return svg_layers_.back(); }
diff --git a/src/libslic3r/Arrange.cpp b/src/libslic3r/Arrange.cpp
index 301f38b08..037e819c2 100644
--- a/src/libslic3r/Arrange.cpp
+++ b/src/libslic3r/Arrange.cpp
@@ -192,6 +192,7 @@ void fill_config(PConf& pcfg, const ArrangeParams &params) {
 
     // Allow parallel execution.
     pcfg.parallel = params.parallel;
+    pcfg.save_svg = params.save_svg;
 
     // BBS: excluded regions in BBS bed
     for (auto& poly : params.excluded_regions)
@@ -548,18 +549,18 @@ protected:
                 score += height_score / valid_items_cnt;
         }
 
-        std::set<int> extruder_ids;
+        std::map<int, std::string> extruder_id_types;
         std::set<int> tpu_extruder_ids;
         for (int i = 0; i < m_items.size(); i++) {
             Item& p = m_items[i];
             if (p.is_virt_object) continue;
-            extruder_ids.insert(p.extrude_ids.begin(),p.extrude_ids.end());
-            for (int j = 0; j < p.extrude_ids.size(); j++) {
-                if (p.filament_types[j] == "TPU") tpu_extruder_ids.insert(p.extrude_ids[j]);
+            extruder_id_types.insert(p.extrude_id_filament_types.begin(), p.extrude_id_filament_types.end());
+            for (auto id_type : p.extrude_id_filament_types) {
+                if (id_type.second == "TPU") tpu_extruder_ids.insert(id_type.first);
             }
         }
-        for (int j = 0; j < item.extrude_ids.size(); j++) {
-            if (item.filament_types[j] == "TPU") tpu_extruder_ids.insert(item.extrude_ids[j]);
+        for (auto id_type : item.extrude_id_filament_types) {
+            if (id_type.second == "TPU") tpu_extruder_ids.insert(id_type.first);
         }
 
         // do not allow more than 1 TPU extruder on same plate
@@ -567,17 +568,17 @@ protected:
         // add a large cost if not multi materials on same plate is not allowed
         else if (!params.allow_multi_materials_on_same_plate) {
             // it's the first object, which can be multi-color
-            bool first_object                 = extruder_ids.empty();
+            bool first_object = extruder_id_types.empty();
             // the two objects (previously packed items and the current item) are considered having same color if either one's colors are a subset of the other
-            std::set<int> item_extruder_ids(item.extrude_ids.begin(), item.extrude_ids.end());
-            bool same_color_with_previous_items = std::includes(extruder_ids.begin(), extruder_ids.end(), item_extruder_ids.begin(), item_extruder_ids.end());
+            bool same_color_with_previous_items = std::includes(extruder_id_types.begin(), extruder_id_types.end(), item.extrude_id_filament_types.begin(),
+                                                                item.extrude_id_filament_types.end());
             if (!(first_object || same_color_with_previous_items)) score += LARGE_COST_TO_REJECT * 1.3;
         }
         // for layered printing, we want extruder change as few as possible
         // this has very weak effect, CAN NOT use a large weight
-        int last_extruder_cnt = extruder_ids.size();
-        extruder_ids.insert(item.extrude_ids.begin(), item.extrude_ids.end());
-        int new_extruder_cnt= extruder_ids.size();
+        int last_extruder_cnt = extruder_id_types.size();
+        extruder_id_types.insert(item.extrude_id_filament_types.begin(), item.extrude_id_filament_types.end());
+        int new_extruder_cnt = extruder_id_types.size();
         if (!params.is_seq_print) {
             score += 1 * (new_extruder_cnt-last_extruder_cnt);
         }
@@ -701,19 +702,19 @@ public:
                 return i1.bed_temp != i2.bed_temp                ? (i1.bed_temp > i2.bed_temp) :
                        i1.height != i2.height                    ? (i1.height < i2.height) :
                        std::abs(i1.area() / i2.area() - 1) > 0.2 ? (i1.area() > i2.area()) :
-                                                                   i1.extrude_ids.front() < i2.extrude_ids.front();
+                                                                   i1.extrude_id_filament_types.begin()->first < i2.extrude_id_filament_types.begin()->first;
             }
             else {
                 // single color objects first, then objects with more colors
-                if (i1.extrude_ids.size() != i2.extrude_ids.size()) {
-                    if (i1.extrude_ids.size() == 1 || i2.extrude_ids.size() == 1)
-                        return i1.extrude_ids.size() == 1;
+                if (i1.extrude_id_filament_types.size() != i2.extrude_id_filament_types.size()) {
+                    if (i1.extrude_id_filament_types.size() == 1 || i2.extrude_id_filament_types.size() == 1)
+                        return i1.extrude_id_filament_types.size() == 1;
                     else
-                        return i1.extrude_ids.size() > i2.extrude_ids.size();
+                        return i1.extrude_id_filament_types.size() > i2.extrude_id_filament_types.size();
                 }
                 else
                     return i1.bed_temp != i2.bed_temp ? (i1.bed_temp > i2.bed_temp) :
-                    i1.extrude_ids != i2.extrude_ids ? (i1.extrude_ids.front() < i2.extrude_ids.front()) :
+                           i1.extrude_id_filament_types != i2.extrude_id_filament_types ? (i1.extrude_id_filament_types.begin()->first < i2.extrude_id_filament_types.begin()->first) :
                     std::abs(i1.height/params.printable_height - i2.height/params.printable_height)>0.05 ? i1.height > i2.height:
                     (i1.area() > i2.area());
             }
@@ -883,7 +884,8 @@ void _arrange(
             try {
                 auto bbox = minAreaBoundingBox<ExPolygon, TCompute<ExPolygon>, boost::rational<LargeInt>>(itm.transformedShape());
                 auto w = bbox.width(), h = bbox.height();
-                if (w > h * 1.1 || h > w * 1.1) { itm.allowed_rotations = {bbox.angleToX() + PI / 2, 0.0};
+                if (w > h * 1.1 || h > w * 1.1) {
+                    itm.allowed_rotations = {bbox.angleToX() + PI / 2, 0.0};
                 }
             } catch (const std::exception &e) {
                 // min_area_boundingbox_rotation may throw exception of dividing 0 if the object is already perfectly aligned to X
@@ -916,8 +918,6 @@ void _arrange(
 
     AutoArranger<BinT> arranger{corrected_bin, mod_params, progressfn, stopfn};
 
-    remove_large_items(excludes, corrected_bin);
-
     // If there is something on the plate
     if (!excludes.empty()) arranger.preload(excludes);
 
@@ -992,13 +992,13 @@ static void process_arrangeable(const ArrangePolygon &arrpoly,
     item.binId(arrpoly.bed_idx);
     item.priority(arrpoly.priority);
     item.itemId(arrpoly.itemid);
-    item.extrude_ids = arrpoly.extrude_ids;
-    item.filament_types = arrpoly.filament_types;
+    item.extrude_id_filament_types = arrpoly.extrude_id_filament_types;
     item.height = arrpoly.height;
     item.name = arrpoly.name;
     //BBS: add virtual object logic
     item.is_virt_object = arrpoly.is_virt_object;
     item.is_wipe_tower = arrpoly.is_wipe_tower;
+    item.is_extrusion_cali_object = arrpoly.is_extrusion_cali_object;
     item.bed_temp = arrpoly.first_bed_temp;
     item.print_temp = arrpoly.print_temp;
     item.vitrify_temp = arrpoly.vitrify_temp;
diff --git a/src/libslic3r/Arrange.hpp b/src/libslic3r/Arrange.hpp
index 741d3b41d..99de6c895 100644
--- a/src/libslic3r/Arrange.hpp
+++ b/src/libslic3r/Arrange.hpp
@@ -61,8 +61,7 @@ struct ArrangePolygon {
     //BBS: add row/col for sudoku-style layout
     int       row{0};
     int       col{0};
-    std::vector<int> extrude_ids{};      /// extruder_id for least extruder switch
-    std::vector<std::string> filament_types{}; /// filament type for different material judge
+    std::map<int, std::string> extrude_id_filament_types; /// extruder_id for least extruder switch, filament type for different material judge
     int filament_temp_type{ -1 };
     int       bed_temp{0};         ///bed temperature for different material judge
     int       print_temp{0};      ///print temperature for different material judge
@@ -127,6 +126,7 @@ struct ArrangeParams {
     bool  avoid_extrusion_cali_region         = true;
     bool  is_seq_print                        = false;
     bool  align_to_y_axis                     = false;
+    bool  save_svg                            = false;
     float bed_shrink_x = 0.1;
     float bed_shrink_y = 0.1;
     float brim_skirt_distance = 0;
diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 011158204..f95c7df69 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -76,6 +76,7 @@ namespace Slic3r {
     //! return same string
 #define L(s) (s)
 #define _(s) Slic3r::I18N::translate(s)
+#define _L(s) Slic3r::I18N::translate(s)
 
 static const float g_min_purge_volume = 100.f;
 static const float g_purge_volume_one_time = 135.f;
@@ -2888,7 +2889,7 @@ void GCode::process_layers(
     else {
         tbb::parallel_pipeline(12, generator & parsing & cooling & build_node);
         std::string message;
-        message = L("Smoothing z direction speed");
+        message = _L("Smoothing z direction speed");
         m_print->set_status(85, message);
         //append data
         for (const LayerResult &res : layers_results) {
@@ -2900,7 +2901,7 @@ void GCode::process_layers(
         }
 
         smooth_calculator.smooth_layer_speed();
-        message = L("Exporting G-code");
+        message = _L("Exporting G-code");
         m_print->set_status(90, message);
         tbb::parallel_pipeline(12, calculate_layer_time & write_gocde & output);
     }
diff --git a/src/libslic3r/Model.cpp b/src/libslic3r/Model.cpp
index a28d02b1c..6ca7571e3 100644
--- a/src/libslic3r/Model.cpp
+++ b/src/libslic3r/Model.cpp
@@ -3596,12 +3596,13 @@ void Model::setPrintSpeedTable(const DynamicPrintConfig& config, const PrintConf
 }
 
 // find temperature of heatend and bed and matierial of an given extruder
-void Model::setExtruderParams(const DynamicPrintConfig& config, int extruders_count) {
+void Model::setExtruderParams(const DynamicPrintConfig &config, int filament_count)
+{
     extruderParamsMap.clear();
     //Slic3r::DynamicPrintConfig config = wxGetApp().preset_bundle->full_config();
     // BBS
     //int numExtruders = wxGetApp().preset_bundle->filament_presets.size();
-    for (unsigned int i = 0; i != extruders_count; ++i) {
+    for (unsigned int i = 0; i != filament_count; ++i) {
         std::string matName = "";
         // BBS
         int bedTemp = 35;
@@ -3973,6 +3974,9 @@ void ModelInstance::get_arrange_polygon(void *ap, const Slic3r::DynamicPrintConf
     ret.rotation                     = 0;
 
     // BBS: add materials related information
+    auto get_filament_name = [](int id) {
+        return Model::extruderParamsMap.find(id) != Model::extruderParamsMap.end() ? Model::extruderParamsMap.at(id).materialName : "PLA";
+    };
     ModelVolume *volume = NULL;
     for (size_t i = 0; i < object->volumes.size(); ++i) {
         if (object->volumes[i]->is_model_part()) {
@@ -3982,7 +3986,9 @@ void ModelInstance::get_arrange_polygon(void *ap, const Slic3r::DynamicPrintConf
                 return;
             }
             auto ve = object->volumes[i]->get_extruders();
-            ret.extrude_ids.insert(ret.extrude_ids.end(), ve.begin(), ve.end());
+            for (auto id : ve) {
+                ret.extrude_id_filament_types.insert({id, get_filament_name(id)});
+            }
         }
     }
 
@@ -3994,16 +4000,12 @@ void ModelInstance::get_arrange_polygon(void *ap, const Slic3r::DynamicPrintConf
         auto op2 = object->get_config_value<ConfigOptionInt>(config_global, "support_interface_filament");
         int  extruder_id;
         // id==0 means follow previous material, so need not be recorded
-        if (op1 && (extruder_id = op1->getInt()) > 0) ret.extrude_ids.push_back(extruder_id);
-        if (op2 && (extruder_id = op2->getInt()) > 0) ret.extrude_ids.push_back(extruder_id);
+        if (op1 && (extruder_id = op1->getInt()) > 0) ret.extrude_id_filament_types.insert({extruder_id, get_filament_name(extruder_id)});
+        if (op2 && (extruder_id = op2->getInt()) > 0) ret.extrude_id_filament_types.insert({extruder_id, get_filament_name(extruder_id)});
     }
 
-    ret.extrude_ids.erase(std::unique(ret.extrude_ids.begin(), ret.extrude_ids.end()), ret.extrude_ids.end());
-    if (ret.extrude_ids.empty()) // the default extruder
-        ret.extrude_ids.push_back(1);
-
-    // filament types must be same size as extrude_ids
-    ret.filament_types.resize(ret.extrude_ids.size(), "PLA");
+    if (ret.extrude_id_filament_types.empty()) // the default extruder
+        ret.extrude_id_filament_types.insert({1, get_filament_name(1)});
 }
 
 void ModelInstance::apply_arrange_result(const Vec2d &offs, double rotation)
diff --git a/src/libslic3r/Model.hpp b/src/libslic3r/Model.hpp
index a5064eafe..deb2afd93 100644
--- a/src/libslic3r/Model.hpp
+++ b/src/libslic3r/Model.hpp
@@ -1623,7 +1623,7 @@ public:
     static Polygon getBedPolygon() { return Model::printSpeedMap.bed_poly; }
     //BBS static functions that update extruder params and speed table
     static void setPrintSpeedTable(const DynamicPrintConfig& config, const PrintConfig& print_config);
-    static void setExtruderParams(const DynamicPrintConfig& config, int extruders_count);
+    static void setExtruderParams(const DynamicPrintConfig& config, int filament_count);
 
     // BBS: backup
     static Model read_from_archive(
diff --git a/src/libslic3r/ModelArrange.cpp b/src/libslic3r/ModelArrange.cpp
index 964e12946..8acb36533 100644
--- a/src/libslic3r/ModelArrange.cpp
+++ b/src/libslic3r/ModelArrange.cpp
@@ -119,7 +119,7 @@ arrangement::ArrangePolygon get_arrange_poly(ModelInstance* inst, const Slic3r::
 ArrangePolygon get_instance_arrange_poly(ModelInstance* instance, const Slic3r::DynamicPrintConfig& config)
 {
     ArrangePolygon ap = get_arrange_poly(PtrWrapper{ instance }, config);
-
+    int            first_extruder_id = ap.extrude_id_filament_types.begin()->first - 1;
     //BBS: add temperature information
     if (config.has("curr_bed_type")) {
         ap.bed_temp = 0;
@@ -127,29 +127,28 @@ ArrangePolygon get_instance_arrange_poly(ModelInstance* instance, const Slic3r::
         BedType curr_bed_type = config.opt_enum<BedType>("curr_bed_type");
 
         const ConfigOptionInts* bed_opt = config.option<ConfigOptionInts>(get_bed_temp_key(curr_bed_type));
-        if (bed_opt != nullptr)
-            ap.bed_temp = bed_opt->get_at(ap.extrude_ids.front()-1);
+        if (bed_opt != nullptr) ap.bed_temp = bed_opt->get_at(first_extruder_id);
 
         const ConfigOptionInts* bed_opt_1st_layer = config.option<ConfigOptionInts>(get_bed_temp_1st_layer_key(curr_bed_type));
         if (bed_opt_1st_layer != nullptr)
-            ap.first_bed_temp = bed_opt_1st_layer->get_at(ap.extrude_ids.front()-1);
+            ap.first_bed_temp = bed_opt_1st_layer->get_at(first_extruder_id);
     }
 
     if (config.has("nozzle_temperature")) //get the print temperature
-        ap.print_temp = config.opt_int_nullable("nozzle_temperature", ap.extrude_ids.front() - 1);
+        ap.print_temp = config.opt_int_nullable("nozzle_temperature", first_extruder_id);
     if (config.has("nozzle_temperature_initial_layer")) //get the nozzle_temperature_initial_layer
-        ap.first_print_temp = config.opt_int_nullable("nozzle_temperature_initial_layer", ap.extrude_ids.front() - 1);
+        ap.first_print_temp = config.opt_int_nullable("nozzle_temperature_initial_layer", first_extruder_id);
 
     if (config.has("temperature_vitrification")) {
-        ap.vitrify_temp = config.opt_int("temperature_vitrification", ap.extrude_ids.front() - 1);
+        ap.vitrify_temp = config.opt_int("temperature_vitrification", first_extruder_id);
     }
 
     // get filament temp types
     auto* filament_types_opt = dynamic_cast<const ConfigOptionStrings*>(config.option("filament_type"));
     if (filament_types_opt) {
         std::set<int> filament_temp_types;
-        for (auto i : ap.extrude_ids) {
-            std::string type_str = filament_types_opt->get_at(i-1);
+        for (auto id : ap.extrude_id_filament_types) {
+            std::string type_str = filament_types_opt->get_at(id.first-1);
             int temp_type = Print::get_filament_temp_type(type_str);
             filament_temp_types.insert(temp_type);
         }
diff --git a/src/libslic3r/VectorFormatter.hpp b/src/libslic3r/VectorFormatter.hpp
index d29eddb6c..bf7bba8f0 100644
--- a/src/libslic3r/VectorFormatter.hpp
+++ b/src/libslic3r/VectorFormatter.hpp
@@ -1,31 +1,38 @@
 #pragma once
 
-#include <Eigen/Core>
 #include <vector>
 #include <iostream>
 
 // custom vector wrapper for outputting to log
-template<typename T> struct VectorFormatter
+template<typename Container> struct VectorFormatter
 {
-    const std::vector<T>* vec = nullptr;
-    const Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic>* mat = nullptr;
-    explicit VectorFormatter(const std::vector<T>& v) : vec(&v) {}
-    explicit VectorFormatter(const Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic>& m) : mat(&m) {}
+    const Container &vec;
+    explicit VectorFormatter(const Container& v) : vec(v) {}
 
-    friend std::ostream& operator<<(std::ostream& os, const VectorFormatter<T>& vf)
+    friend std::ostream &operator<<(std::ostream &os, const VectorFormatter<Container> &vf)
     {
         os << "[";
-        if (vf.vec) {
-            for (size_t i = 0; i < vf.vec->size(); ++i) {
-                os << (*vf.vec)[i];
-                if (i != vf.vec->size() - 1) { os << ", "; }
-            }
-        }
-        else {
-            for (int i = 0; i < vf.mat->size(); ++i) {
-                os << (*vf.mat)(i);
-                if (i != vf.mat->size() - 1) { os << ", "; }
-            }
+        for (auto it = vf.vec.begin(); it != vf.vec.end();it++) {
+            os << *it;
+            if (std::next(it) != vf.vec.end()) { os << ", "; }
+        }
+        os << "]";
+        return os;
+    }
+};
+
+// custom vector wrapper for outputting to log
+template<typename T1, typename T2> struct MapFormatter
+{
+    const std::map<T1, T2> &vec;
+    explicit MapFormatter(const std::map<T1, T2> &v) : vec(v) {}
+
+    friend std::ostream &operator<<(std::ostream &os, const MapFormatter<T1,T2> &vf)
+    {
+        os << "[";
+        for (auto it = vf.vec.begin(); it != vf.vec.end(); it++) {
+            os << it->first << " : " << it->second;
+            if (std::next(it) != vf.vec.end()) { os << ", "; }
         }
         os << "]";
         return os;
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index f3461c067..20984abca 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -3535,6 +3535,7 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
     int keyCode = evt.GetKeyCode();
     int ctrlMask = wxMOD_CONTROL;
     int shiftMask = wxMOD_SHIFT;
+    int altMask   = wxMOD_ALT;
 
     auto imgui = wxGetApp().imgui();
     if (imgui->update_key_data(evt)) {
@@ -3758,6 +3759,8 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
             {
                 if ((evt.GetModifiers() & shiftMask) != 0)
                     post_event(SimpleEvent(EVT_GLCANVAS_ARRANGE_PARTPLATE));
+                else if ((evt.GetModifiers() & altMask) != 0)
+                    post_event(SimpleEvent(EVT_GLCANVAS_ARRANGE_OUTPLATE));
                 else
                     post_event(SimpleEvent(EVT_GLCANVAS_ARRANGE));
                 break;
@@ -6117,6 +6120,7 @@ bool GLCanvas3D::_render_arrange_menu(float left, float right, float bottom, flo
     std::string multi_material_key = "allow_multi_materials_on_same_plate";
     std::string avoid_extrusion_key = "avoid_extrusion_cali_region";
     std::string align_to_y_axis_key = "align_to_y_axis";
+    std::string save_svg_key        = "save_svg";
     std::string postfix             = settings.postfix;
     //BBS:
     bool seq_print = settings.is_seq_print;
@@ -6144,6 +6148,13 @@ bool GLCanvas3D::_render_arrange_menu(float left, float right, float bottom, flo
     imgui->text(_L("0 means auto spacing."));
 
     ImGui::Separator();
+#if !BBL_RELEASE_TO_PUBLIC
+    if (imgui->bbl_checkbox(_L("Save SVG"), settings.save_svg)) {
+        settings_out.save_svg = settings.save_svg;
+        appcfg->set("arrange", save_svg_key.c_str(), settings_out.save_svg ? "1" : "0");
+        settings_changed = true;
+    }
+#endif
     if (imgui->bbl_checkbox(_L("Auto rotate for arrangement"), settings.enable_rotation)) {
         settings_out.enable_rotation = settings.enable_rotation;
         appcfg->set("arrange", rot_key.c_str(), settings_out.enable_rotation? "1" : "0");
@@ -11179,6 +11190,10 @@ const SLAPrint* GLCanvas3D::sla_print() const
 
 void GLCanvas3D::WipeTowerInfo::apply_wipe_tower() const
 {
+    if (m_plate_idx >= wxGetApp().plater()->get_partplate_list().get_plate_count()) {
+        BOOST_LOG_TRIVIAL(error) << "Invalid plate index: " << m_plate_idx << ">=" << wxGetApp().plater()->get_partplate_list().get_plate_count();
+        return;
+    }
     // BBS: add partplate logic
     DynamicConfig& proj_cfg = wxGetApp().preset_bundle->project_config;
     Vec3d plate_origin = wxGetApp().plater()->get_partplate_list().get_plate(m_plate_idx)->get_origin();
diff --git a/src/slic3r/GUI/GLCanvas3D.hpp b/src/slic3r/GUI/GLCanvas3D.hpp
index 21670e002..11548df6f 100644
--- a/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/src/slic3r/GUI/GLCanvas3D.hpp
@@ -528,6 +528,7 @@ public:
         //BBS: add more arrangeSettings
         bool is_seq_print        = false;
         bool  align_to_y_axis    = false;
+        bool        save_svg            = false; // for debug
         std::string postfix;
         void        reset()
         {
diff --git a/src/slic3r/GUI/Jobs/ArrangeJob.cpp b/src/slic3r/GUI/Jobs/ArrangeJob.cpp
index e33752081..0174f949c 100644
--- a/src/slic3r/GUI/Jobs/ArrangeJob.cpp
+++ b/src/slic3r/GUI/Jobs/ArrangeJob.cpp
@@ -111,26 +111,6 @@ ArrangePolygon ArrangeJob::prepare_arrange_polygon(void *model_instance)
     auto preset_bundle = wxGetApp().preset_bundle;
     const Slic3r::DynamicPrintConfig& config = preset_bundle->full_config();
     ArrangePolygon ap = get_instance_arrange_poly(instance, config);
-
-    // get filament types such as PLA, ABS, etc.
-    ap.filament_types.clear();
-    for (size_t i = 0; i < preset_bundle->filament_presets.size(); ++i) {
-        auto iter = std::find(ap.extrude_ids.begin(), ap.extrude_ids.end(), i + 1);
-        if (iter == ap.extrude_ids.end()) continue;
-
-        std::string filament_name = preset_bundle->filament_presets[i];
-        for (int f_index = 0; f_index < preset_bundle->filaments.size(); f_index++) {
-            PresetCollection *filament_presets = &preset_bundle->filaments;
-            Preset           *preset           = &filament_presets->preset(f_index);
-            int               size             = preset_bundle->filaments.size();
-            if (preset && filament_name.compare(preset->name) == 0) {
-                std::string display_filament_type;
-                std::string filament_type = preset->config.get_filament_type(display_filament_type);
-                ap.filament_types.push_back(filament_type);
-            }
-        }
-    }
-
     return ap;
 }
 
@@ -328,9 +308,7 @@ void ArrangeJob::prepare_wipe_tower(bool select)
     // estimate if we need wipe tower for all plates:
     // need wipe tower if some object has multiple extruders (has paint-on colors or support material)
     for (const auto& item : m_selected) {
-        std::set<int> obj_extruders;
-        obj_extruders.insert(item.extrude_ids.begin(), item.extrude_ids.end());
-        if (obj_extruders.size() > 1) {
+        if (item.extrude_id_filament_types.size() > 1) {
             need_wipe_tower = true;
             ARRANGE_LOG(info) << "need wipe tower because object " << item.name << " has multiple extruders (has paint-on colors)";
             break;
@@ -342,7 +320,7 @@ void ArrangeJob::prepare_wipe_tower(bool select)
     if (params.allow_multi_materials_on_same_plate) {
         std::map<int, std::set<int>> bedTemp2extruderIds;
         for (const auto& item : m_selected)
-            for (auto id : item.extrude_ids) { bedTemp2extruderIds[item.bed_temp].insert(id); }
+            for (auto id : item.extrude_id_filament_types) { bedTemp2extruderIds[item.bed_temp].insert(id.first); }
         for (const auto& be : bedTemp2extruderIds) {
             if (be.second.size() > 1) {
                 need_wipe_tower = true;
@@ -432,11 +410,9 @@ void ArrangeJob::prepare_partplate() {
             bool             in_plate = plate->contain_instance(oidx, inst_idx) || plate->intersect_instance(oidx, inst_idx);
             ArrangePolygon&& ap = prepare_arrange_polygon(mo->instances[inst_idx]);
 
-            ArrangePolygons& cont = mo->instances[inst_idx]->printable ?
-                (in_plate ? m_selected : m_unselected) :
-                m_unprintable;
+            ArrangePolygons &cont   = mo->instances[inst_idx]->printable ? m_selected : m_unprintable;
             bool locked = plate_list.preprocess_arrange_polygon_other_locked(oidx, inst_idx, ap, in_plate);
-            if (!locked)
+            if (!locked && in_plate)
             {
                 ap.itemid = cont.size();
                 cont.emplace_back(std::move(ap));
@@ -510,9 +486,10 @@ void ArrangeJob::prepare_outside_plate() {
             }
             if (iter2 != all_outside_objects.end()) {
                 outside_plate = true;
+                ARRANGE_LOG(debug) << object->name << " is outside!";
             }
             ArrangePolygon&& ap = prepare_arrange_polygon(instance);
-            ArrangePolygons &cont  = instance->printable ? (outside_plate ? m_selected : m_locked) : m_unprintable;
+            ArrangePolygons &cont = instance->printable ? (outside_plate ? m_selected : m_unselected) : m_unprintable;
             ap.itemid                      = cont.size();
             if (!outside_plate) {
                 plate_list.preprocess_arrange_polygon(obj_idx, inst_idx, ap, false);
@@ -538,9 +515,9 @@ void ArrangeJob::prepare()
     const Slic3r::DynamicPrintConfig& config = wxGetApp().preset_bundle->full_config();
     auto& print = wxGetApp().plater()->get_partplate_list().get_current_fff_print();
     auto print_config = print.config();
-    int numExtruders = wxGetApp().preset_bundle->filament_presets.size();
+    int filament_count = wxGetApp().preset_bundle->filament_presets.size();
 
-    Model::setExtruderParams(config, numExtruders);
+    Model::setExtruderParams(config, filament_count);
     Model::setPrintSpeedTable(config, print_config);
 
     int state = m_plater->get_prepare_state();
@@ -602,7 +579,7 @@ void ArrangeJob::prepare()
 
     if (!m_selected.empty()) {
         m_plater->get_notification_manager()->push_notification(NotificationType::ArrangeOngoing, NotificationManager::NotificationLevel::RegularNotificationLevel,
-                                                                _u8L("Arranging..."));
+                                                                _u8L("Arranging") + "...");
         m_plater->get_notification_manager()->bbl_close_plateinfo_notification();
     }
 }
@@ -667,36 +644,34 @@ void ArrangeJob::process()
         update_status(num_finished, _L("Arranging") + " "+ wxString::FromUTF8(str));
     };
 
-    ArrangePolygons unselected_and_locked = m_unselected;
-    append(unselected_and_locked, m_locked);
     {
         ARRANGE_LOG(warning)<< "full params: "<< params.to_json();
         ARRANGE_LOG(info) << boost::format("items selected before arranging: %1%") % m_selected.size();
         for (auto selected : m_selected) {
-            ARRANGE_LOG(debug) << selected.name << ", extruder: " << VectorFormatter(selected.extrude_ids)
-                                     << ", filament types: " << VectorFormatter(selected.filament_types) << ", bed: " << selected.bed_idx
-                                     << ", filemant_type:" << selected.filament_temp_type << ", trans: " << unscale<double>(selected.translation(X)) << ","
-                                     << unscale<double>(selected.translation(Y)) << ", rotation: " << selected.rotation;
+            ARRANGE_LOG(debug) << selected.name << ", extruder: " << MapFormatter(selected.extrude_id_filament_types) << ", bed: " << selected.bed_idx
+                               << ", filemant_type:" << selected.filament_temp_type << ", trans: " << unscale<double>(selected.translation(X)) << ","
+                               << unscale<double>(selected.translation(Y)) << ", rotation: " << selected.rotation;
         }
-        ARRANGE_LOG(debug) << "items unselected before arrange: " << unselected_and_locked.size();
-        for (auto item : unselected_and_locked)
-            ARRANGE_LOG(debug) << item.name << ", bed: " << item.bed_idx << ", trans: " << unscale<double>(item.translation(X)) << "," << unscale<double>(item.translation(Y));
+        ARRANGE_LOG(debug) << "items unselected before arrange: " << m_unselected.size();
+        for (auto item : m_unselected)
+            BOOST_LOG_TRIVIAL(debug) << item.name << ", bed: " << item.bed_idx << ", trans: " << unscale<double>(item.translation(X)) << ","
+                                     << unscale<double>(item.translation(Y));
     }
 
-    arrangement::arrange(m_selected, unselected_and_locked, bedpts, params);
+    arrangement::arrange(m_selected, m_unselected, bedpts, params);
 
     // sort by item id
     std::sort(m_selected.begin(), m_selected.end(), [](auto a, auto b) {return a.itemid < b.itemid; });
     {
         ARRANGE_LOG(info) << boost::format("items selected after arranging: %1%") % m_selected.size();
         for (auto selected : m_selected)
-            ARRANGE_LOG(debug) << selected.name << ", extruder: " << VectorFormatter(selected.extrude_ids) << ", bed: " << selected.bed_idx
+            ARRANGE_LOG(debug) << selected.name << ", extruder: " << MapFormatter(selected.extrude_id_filament_types) << ", bed: " << selected.bed_idx
                                      << ", bed_temp: " << selected.first_bed_temp << ", print_temp: " << selected.print_temp
                                      << ", trans: " << unscale<double>(selected.translation(X)) << "," << unscale<double>(selected.translation(Y))
                                      << ", rotation: " << selected.rotation;
-        ARRANGE_LOG(debug) << "items unselected after arrange: " << unselected_and_locked.size();
-        for (auto item : unselected_and_locked)
-            ARRANGE_LOG(debug) << item.name << ", bed: " << item.bed_idx << ", trans: " << unscale<double>(item.translation(X)) << "," << unscale<double>(item.translation(Y));
+        ARRANGE_LOG(debug) << "items unselected after arrange: " << m_unselected.size();
+        for (auto item : m_unselected)
+            BOOST_LOG_TRIVIAL(debug) << item.name << ", bed: " << item.bed_idx << ", trans: " << unscale<double>(item.translation(X)) << "," << unscale<double>(item.translation(Y));
     }
 
     // put unpackable items to m_unprintable so they goes outside
@@ -752,7 +727,7 @@ void ArrangeJob::finalize()
 
             beds = std::max(ap.bed_idx, beds);
 
-            ARRANGE_LOG(debug) << __FUNCTION__ << boost::format(": selected %4%: bed_id %1%, trans {%2%,%3%}") % ap.bed_idx % unscale<double>(ap.translation(X)) % unscale<double>(ap.translation(Y)) % ap.name;
+            ARRANGE_LOG(debug) << __FUNCTION__ << boost::format(": selected %4%: bed_id %1%, trans {%2%, %3%}") % ap.bed_idx % unscale<double>(ap.translation(X)) % unscale<double>(ap.translation(Y)) % ap.name;
         }
 
         //BBS: adjust the bed_index, create new plates, get the max bed_index
@@ -765,7 +740,7 @@ void ArrangeJob::finalize()
                 plate_list.postprocess_bed_index_for_unselected(ap);
 
             beds = std::max(ap.bed_idx, beds);
-            ARRANGE_LOG(debug) << __FUNCTION__ << boost::format(": unselected %4%: bed_id %1%, trans {%2%,%3%}") % ap.bed_idx % unscale<double>(ap.translation(X)) % unscale<double>(ap.translation(Y)) % ap.name;
+            ARRANGE_LOG(debug) << __FUNCTION__ << boost::format(": unselected %4%: bed_id %1%, trans {%2%, %3%}") % ap.bed_idx % unscale<double>(ap.translation(X)) % unscale<double>(ap.translation(Y)) % ap.name;
         }
 
         for (ArrangePolygon& ap : m_locked) {
@@ -893,6 +868,9 @@ arrangement::ArrangeParams init_arrange_params(Plater *p)
     params.is_seq_print                        = settings.is_seq_print;
     params.min_obj_distance                    = scaled(settings.distance);
     params.align_to_y_axis                     = settings.align_to_y_axis;
+#if !BBL_RELEASE_TO_PUBLIC
+    params.save_svg                            = settings.save_svg;
+#endif
 
     int state = p->get_prepare_state();
     if (state == Job::JobPrepareState::PREPARE_STATE_MENU) {
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 2093e61ae..8e83282e5 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -4844,9 +4844,9 @@ void Plater::priv::select_view_3D(const std::string& name, bool no_slice)
         const Slic3r::DynamicPrintConfig& config = wxGetApp().preset_bundle->full_config();
         auto& print = q->get_partplate_list().get_current_fff_print();
         auto print_config = print.config();
-        int numExtruders = wxGetApp().preset_bundle->filament_presets.size();
+        int filament_count = wxGetApp().preset_bundle->filament_presets.size();
 
-        Model::setExtruderParams(config, numExtruders);
+        Model::setExtruderParams(config, filament_count);
         Model::setPrintSpeedTable(config, print_config);
         set_current_panel(preview, no_slice);
     }
@@ -5740,7 +5740,7 @@ std::vector<size_t> Plater::priv::load_files(const std::vector<fs::path>& input_
 
             // BBS
             BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ":" << __LINE__ << boost::format("import 3mf IMPORT_LOAD_MODEL_OBJECTS \n");
-            wxString msg = wxString::Format("Loading file: %s", from_path(real_filename));
+            wxString msg = wxString::Format(_L("Loading file: %s"), from_path(real_filename));
             model_idx++;
             dlg_cont = dlg.Update(progress_percent, msg);
             if (!dlg_cont) {
@@ -8666,9 +8666,9 @@ void Plater::priv::on_action_slice_plate(SimpleEvent&)
         const Slic3r::DynamicPrintConfig& config = wxGetApp().preset_bundle->full_config();
         auto& print = q->get_partplate_list().get_current_fff_print();
         auto print_config = print.config();
-        int numExtruders = wxGetApp().preset_bundle->filament_presets.size();
+        int filament_count = wxGetApp().preset_bundle->filament_presets.size();
 
-        Model::setExtruderParams(config, numExtruders);
+        Model::setExtruderParams(config, filament_count);
         Model::setPrintSpeedTable(config, print_config);
         m_slice_all = false;
         q->reslice();
@@ -8685,9 +8685,9 @@ void Plater::priv::on_action_slice_all(SimpleEvent&)
         const Slic3r::DynamicPrintConfig& config = wxGetApp().preset_bundle->full_config();
         auto& print = q->get_partplate_list().get_current_fff_print();
         auto print_config = print.config();
-        int numExtruders = wxGetApp().preset_bundle->filament_presets.size();
+        int filament_count = wxGetApp().preset_bundle->filament_presets.size();
 
-        Model::setExtruderParams(config, numExtruders);
+        Model::setExtruderParams(config, filament_count);
         Model::setPrintSpeedTable(config, print_config);
         m_slice_all = true;
         m_slice_all_only_has_gcode = true;