diff --git a/src/libslic3r/AppConfig.cpp b/src/libslic3r/AppConfig.cpp
index f79f48c279..426cc53309 100644
--- a/src/libslic3r/AppConfig.cpp
+++ b/src/libslic3r/AppConfig.cpp
@@ -175,6 +175,8 @@ void AppConfig::set_defaults()
 #ifdef _WIN32
         if (get("associate_gcode").empty())
             set("associate_gcode", "0");
+        if (get("associate_bgcode").empty())
+            set("associate_bgcode", "0");
 #endif // _WIN32
     }
 
diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp
index 6c295279ad..3989eab3d2 100644
--- a/src/libslic3r/Technologies.hpp
+++ b/src/libslic3r/Technologies.hpp
@@ -61,4 +61,5 @@
 // Enable imgui dialog which allows to set the parameters used to export binarized gcode
 #define ENABLE_BINARIZED_GCODE_DEBUG_WINDOW 0
 
+
 #endif // _prusaslicer_technologies_h_
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 4d760c7e9f..2b4fbcee5f 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -981,7 +981,7 @@ void GLCanvas3D::SequentialPrintClearance::render()
     glsafe(::glEnable(GL_BLEND));
     glsafe(::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
 
-    if (!m_evaluating)
+    if (!m_evaluating && !m_dragging)
         m_fill.render();
 
 #if ENABLE_GL_CORE_PROFILE
@@ -1029,6 +1029,7 @@ wxDEFINE_EVENT(EVT_GLCANVAS_INSTANCE_MOVED, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_INSTANCE_ROTATED, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_RESET_SKEW, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_INSTANCE_SCALED, SimpleEvent);
+wxDEFINE_EVENT(EVT_GLCANVAS_INSTANCE_MIRRORED, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_FORCE_UPDATE, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_WIPETOWER_MOVED, Vec3dEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_WIPETOWER_ROTATED, Vec3dEvent);
@@ -3732,6 +3733,7 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
                         if (!evt.CmdDown())
                             m_mouse.drag.start_position_3D = m_mouse.scene_position;
                         m_sequential_print_clearance_first_displacement = true;
+                        m_sequential_print_clearance.start_dragging();
                     }
                 }
             }
@@ -3856,6 +3858,7 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
         else if (m_mouse.drag.move_volume_idx != -1 && m_mouse.dragging) {
             do_move(L("Move Object"));
             wxGetApp().obj_manipul()->set_dirty();
+            m_sequential_print_clearance.stop_dragging();
             // Let the plater know that the dragging finished, so a delayed refresh
             // of the scene with the background processing data should be performed.
             post_event(SimpleEvent(EVT_GLCANVAS_MOUSE_DRAGGING_FINISHED));
@@ -4328,7 +4331,7 @@ void GLCanvas3D::do_mirror(const std::string& snapshot_type)
     for (int id : obj_idx_for_update_info_items)
         wxGetApp().obj_list()->update_info_items(static_cast<size_t>(id));
 
-    post_event(SimpleEvent(EVT_GLCANVAS_SCHEDULE_BACKGROUND_PROCESS));
+    post_event(SimpleEvent(EVT_GLCANVAS_INSTANCE_MIRRORED));
 
     m_dirty = true;
 }
diff --git a/src/slic3r/GUI/GLCanvas3D.hpp b/src/slic3r/GUI/GLCanvas3D.hpp
index 26be98665b..0660ca7cc9 100644
--- a/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/src/slic3r/GUI/GLCanvas3D.hpp
@@ -167,6 +167,7 @@ wxDECLARE_EVENT(EVT_GLCANVAS_WIPETOWER_MOVED, Vec3dEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_INSTANCE_ROTATED, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_RESET_SKEW, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_INSTANCE_SCALED, SimpleEvent);
+wxDECLARE_EVENT(EVT_GLCANVAS_INSTANCE_MIRRORED, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_WIPETOWER_ROTATED, Vec3dEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_ENABLE_ACTION_BUTTONS, Event<bool>);
 wxDECLARE_EVENT(EVT_GLCANVAS_UPDATE_GEOMETRY, Vec3dsEvent<2>);
@@ -618,6 +619,7 @@ private:
         // list of transforms used to render the contours
         std::vector<std::pair<size_t, Transform3d>> m_instances;
         bool m_evaluating{ false };
+        bool m_dragging{ false };
 
         std::vector<std::pair<Pointf3s, Transform3d>> m_hulls_2d_cache;
 
@@ -627,6 +629,10 @@ private:
         void render();
         bool empty() const { return m_contours.empty(); }
 
+        void start_dragging() { m_dragging = true; }
+        bool is_dragging() const { return m_dragging; }
+        void stop_dragging() { m_dragging = false; }
+
         friend class GLCanvas3D;
     };
 
@@ -965,11 +971,18 @@ public:
 
     void reset_sequential_print_clearance() {
         m_sequential_print_clearance.m_evaluating = false;
-        m_sequential_print_clearance.set_contours(ContoursList(), false);
+        if (m_sequential_print_clearance.is_dragging())
+            m_sequential_print_clearance_first_displacement = true;
+        else
+            m_sequential_print_clearance.set_contours(ContoursList(), false);
+        set_as_dirty();
+        request_extra_frame();
     }
 
     void set_sequential_print_clearance_contours(const ContoursList& contours, bool generate_fill) {
         m_sequential_print_clearance.set_contours(contours, generate_fill);
+        set_as_dirty();
+        request_extra_frame();
     }
 
     bool is_sequential_print_clearance_empty() const {
@@ -981,7 +994,11 @@ public:
     }
 
     void update_sequential_clearance(bool force_contours_generation);
-    void set_sequential_clearance_as_evaluating() { m_sequential_print_clearance.m_evaluating = true; }
+    void set_sequential_clearance_as_evaluating() {
+        m_sequential_print_clearance.m_evaluating = true;
+        set_as_dirty();
+        request_extra_frame();
+    }
 
     const Print* fff_print() const;
     const SLAPrint* sla_print() const;
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 1728bc3c6b..d69f5b33de 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1290,6 +1290,8 @@ bool GUI_App::on_init_inner()
 #ifdef __WXMSW__ 
         if (app_config->get_bool("associate_gcode"))
             associate_gcode_files();
+        if (app_config->get_bool("associate_bgcode"))
+            associate_bgcode_files();
 #endif // __WXMSW__
     }
     
@@ -2583,6 +2585,8 @@ void GUI_App::open_preferences(const std::string& highlight_option /*= std::stri
     else {
         if (app_config->get_bool("associate_gcode"))
             associate_gcode_files();
+        if (app_config->get_bool("associate_bgcode"))
+            associate_bgcode_files();
     }
 #endif // _WIN32
 
@@ -3370,6 +3374,11 @@ void GUI_App::associate_gcode_files()
 {
     associate_file_type(L".gcode", L"PrusaSlicer.GCodeViewer.1", L"PrusaSlicerGCodeViewer", true);
 }
+
+void GUI_App::associate_bgcode_files()
+{
+    associate_file_type(L".bgcode", L"PrusaSlicer.GCodeViewer.1", L"PrusaSlicerGCodeViewer", true);
+}
 #endif // __WXMSW__
 
 void GUI_App::on_version_read(wxCommandEvent& evt)
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index 467c2aaeb6..6951f654b6 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -368,6 +368,7 @@ public:
     void            associate_3mf_files();
     void            associate_stl_files();
     void            associate_gcode_files();
+    void            associate_bgcode_files();
 #endif // __WXMSW__
 
 
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp b/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp
index 053f24418c..72ca3e3cf9 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp
@@ -204,10 +204,11 @@ void GLGizmoRotate::init_data_from_selection(const Selection& selection)
     const auto [box, box_trafo] = m_force_local_coordinate ?
         selection.get_bounding_box_in_reference_system(ECoordinatesType::Local) : selection.get_bounding_box_in_current_reference_system();
     m_bounding_box = box;
-    m_center = box_trafo.translation();
+    const std::pair<Vec3d, double> sphere = selection.get_bounding_sphere();
+    m_center = sphere.first;
+    m_radius = Offset + sphere.second;
     m_orient_matrix = box_trafo;
-
-    m_radius = Offset + m_bounding_box.radius();
+    m_orient_matrix.translation() = m_center;
     m_snap_coarse_in_radius = m_radius / 3.0f;
     m_snap_coarse_out_radius = 2.0f * m_snap_coarse_in_radius;
     m_snap_fine_in_radius = m_radius;
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 39d428c2fe..72d9c1905e 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -2171,6 +2171,7 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
         view3D_canvas->Bind(EVT_GLCANVAS_INSTANCE_ROTATED, [this](SimpleEvent&) { update(); });
         view3D_canvas->Bind(EVT_GLCANVAS_RESET_SKEW, [this](SimpleEvent&) { update(); });
         view3D_canvas->Bind(EVT_GLCANVAS_INSTANCE_SCALED, [this](SimpleEvent&) { update(); });
+        view3D_canvas->Bind(EVT_GLCANVAS_INSTANCE_MIRRORED, [this](SimpleEvent&) { update(); });
         view3D_canvas->Bind(EVT_GLCANVAS_ENABLE_ACTION_BUTTONS, [this](Event<bool>& evt) { this->sidebar->enable_buttons(evt.data); });
         view3D_canvas->Bind(EVT_GLCANVAS_UPDATE_GEOMETRY, &priv::on_update_geometry, this);
         view3D_canvas->Bind(EVT_GLCANVAS_MOUSE_DRAGGING_STARTED, &priv::on_3dcanvas_mouse_dragging_started, this);
@@ -3386,8 +3387,6 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
                     GLCanvas3D::ContoursList contours;
                     contours.contours = background_process.fff_print()->get_sequential_print_clearance_contours();
                     canvas->set_sequential_print_clearance_contours(contours, true);
-                    canvas->set_as_dirty();
-                    canvas->request_extra_frame();
                 }
             }
         }
@@ -3402,8 +3401,6 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
                     GLCanvas3D::ContoursList contours;
                     contours.contours = background_process.fff_print()->get_sequential_print_clearance_contours();
                     canvas->set_sequential_print_clearance_contours(contours, true);
-                    canvas->set_as_dirty();
-                    canvas->request_extra_frame();
                 }
             }
             std::vector<std::string> warnings;
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index ecb1d152eb..6fb2f23258 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -367,6 +367,10 @@ void PreferencesDialog::build()
 			L("Associate .gcode files to PrusaSlicer G-code Viewer"),
 			L("If enabled, sets PrusaSlicer G-code Viewer as default application to open .gcode files."),
 			app_config->get_bool("associate_gcode"));
+		append_bool_option(m_optgroup_general, "associate_bgcode",
+			L("Associate .bgcode files to PrusaSlicer G-code Viewer"),
+			L("If enabled, sets PrusaSlicer G-code Viewer as default application to open .bgcode files."),
+			app_config->get_bool("associate_bgcode"));
 	}
 #endif // _WIN32
 
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index dbad0e9f04..9e5e68ac59 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -29,6 +29,10 @@
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/log/trivial.hpp>
 
+#include <CGAL/Simple_cartesian.h>
+#include <CGAL/Min_sphere_of_spheres_d.h>
+#include <CGAL/Min_sphere_of_points_d_traits_3.h>
+
 static const Slic3r::ColorRGBA UNIFORM_SCALE_COLOR     = Slic3r::ColorRGBA::ORANGE();
 static const Slic3r::ColorRGBA SOLID_PLANE_COLOR       = Slic3r::ColorRGBA::ORANGE();
 static const Slic3r::ColorRGBA TRANSPARENT_PLANE_COLOR = { 0.8f, 0.8f, 0.8f, 0.5f };
@@ -906,6 +910,41 @@ BoundingBoxf Selection::get_screen_space_bounding_box()
     return ss_box;
 }
 
+const std::pair<Vec3d, double> Selection::get_bounding_sphere() const
+{
+    if (!m_bounding_sphere.has_value()) {
+        std::optional<std::pair<Vec3d, double>>* sphere = const_cast<std::optional<std::pair<Vec3d, double>>*>(&m_bounding_sphere);
+        *sphere = { Vec3d::Zero(), 0.0 };
+
+        using K = CGAL::Simple_cartesian<float>;
+        using Traits = CGAL::Min_sphere_of_points_d_traits_3<K, float>;
+        using Min_sphere = CGAL::Min_sphere_of_spheres_d<Traits>;
+        using Point = K::Point_3;
+
+        std::vector<Point> points;
+        if (m_valid) {
+            for (unsigned int i : m_list) {
+                const GLVolume& volume = *(*m_volumes)[i];
+                const TriangleMesh* hull = volume.convex_hull();
+                const indexed_triangle_set& its = (hull != nullptr) ?
+                    hull->its : m_model->objects[volume.object_idx()]->volumes[volume.volume_idx()]->mesh().its;
+                const Transform3d& matrix = volume.world_matrix();
+                for (const Vec3f& v : its.vertices) {
+                    const Vec3d vv = matrix * v.cast<double>();
+                    points.push_back(Point(vv.x(), vv.y(), vv.z()));
+                }
+            }
+
+            Min_sphere ms(points.begin(), points.end());
+            const float* center_x = ms.center_cartesian_begin();
+            (*sphere)->first = { *center_x, *(center_x + 1), *(center_x + 2) };
+            (*sphere)->second = ms.radius();
+        }
+    }
+
+    return *m_bounding_sphere;
+}
+
 void Selection::setup_cache()
 {
     if (!m_valid)
@@ -993,15 +1032,15 @@ void Selection::rotate(const Vec3d& rotation, TransformationType transformation_
                 rotation_matrix = inst_matrix_no_offset.inverse() * inst_rotation_matrix * rotation_matrix * inst_rotation_matrix.inverse() * inst_matrix_no_offset;
 
                 // rotate around selection center
-                const Vec3d inst_pivot = inst_trafo.get_matrix_no_offset().inverse() * (m_cache.dragging_center - inst_trafo.get_offset());
+                const Vec3d inst_pivot = inst_trafo.get_matrix_no_offset().inverse() * (m_cache.rotation_pivot - inst_trafo.get_offset());
                 rotation_matrix = Geometry::translation_transform(inst_pivot) * rotation_matrix * Geometry::translation_transform(-inst_pivot);
             }
-            transform_instance_relative(v, volume_data, transformation_type, rotation_matrix, m_cache.dragging_center);
+            transform_instance_relative(v, volume_data, transformation_type, rotation_matrix, m_cache.rotation_pivot);
         }
         else {
             if (!is_single_volume_or_modifier()) {
                 assert(transformation_type.world());
-                transform_volume_relative(v, volume_data, transformation_type, rotation_matrix, m_cache.dragging_center);
+                transform_volume_relative(v, volume_data, transformation_type, rotation_matrix, m_cache.rotation_pivot);
             }
             else {
                 if (transformation_type.instance()) {
@@ -1027,7 +1066,7 @@ void Selection::rotate(const Vec3d& rotation, TransformationType transformation_
                             vol_rotation_matrix.inverse() * inst_scale_matrix * vol_matrix_no_offset;
                     }
                 }
-                transform_volume_relative(v, volume_data, transformation_type, rotation_matrix, m_cache.dragging_center);
+                transform_volume_relative(v, volume_data, transformation_type, rotation_matrix, m_cache.rotation_pivot);
             }
         }
     }
@@ -1550,10 +1589,7 @@ void Selection::erase()
         ensure_not_below_bed();
     }
 
-    GLCanvas3D* canvas = wxGetApp().plater()->canvas3D();
-    canvas->set_sequential_clearance_as_evaluating();
-    canvas->set_as_dirty();
-    canvas->request_extra_frame();
+    wxGetApp().plater()->canvas3D()->set_sequential_clearance_as_evaluating();
 }
 
 void Selection::render(float scale_factor)
@@ -2039,6 +2075,7 @@ void Selection::set_caches()
             m_cache.sinking_volumes.push_back(i);
     }
     m_cache.dragging_center = get_bounding_box().center();
+    m_cache.rotation_pivot = get_bounding_sphere().first;
 }
 
 void Selection::do_add_volume(unsigned int volume_idx)
diff --git a/src/slic3r/GUI/Selection.hpp b/src/slic3r/GUI/Selection.hpp
index e7f4ceb16b..a64519f2e8 100644
--- a/src/slic3r/GUI/Selection.hpp
+++ b/src/slic3r/GUI/Selection.hpp
@@ -115,6 +115,7 @@ private:
         ObjectIdxsToInstanceIdxsMap content;
         // List of ids of the volumes which are sinking when starting dragging
         std::vector<unsigned int> sinking_volumes;
+        Vec3d rotation_pivot;
     };
 
     // Volumes owned by GLCanvas3D.
@@ -151,6 +152,8 @@ private:
     // and transform to place and orient it in world coordinates
     std::optional<std::pair<BoundingBoxf3, Transform3d>> m_bounding_box_in_current_reference_system;
 
+    std::optional<std::pair<Vec3d, double>> m_bounding_sphere;
+
 #if ENABLE_RENDER_SELECTION_CENTER
     GLModel m_vbo_sphere;
 #endif // ENABLE_RENDER_SELECTION_CENTER
@@ -296,6 +299,9 @@ public:
     // Returns the screen space bounding box
     BoundingBoxf get_screen_space_bounding_box();
 
+    // Returns the bounding sphere: first = center, second = radius
+    const std::pair<Vec3d, double> get_bounding_sphere() const;
+
     void setup_cache();
 
     void translate(const Vec3d& displacement, TransformationType transformation_type);
@@ -361,6 +367,7 @@ private:
         m_full_unscaled_instance_bounding_box.reset(); m_full_scaled_instance_bounding_box.reset();
         m_full_unscaled_instance_local_bounding_box.reset();
         m_bounding_box_in_current_reference_system.reset();
+        m_bounding_sphere.reset();
     }
     void render_synchronized_volumes();
     void render_bounding_box(const BoundingBoxf3& box, const Transform3d& trafo, const ColorRGB& color);
diff --git a/src/slic3r/Utils/Http.cpp b/src/slic3r/Utils/Http.cpp
index d41419ebf0..797207552c 100644
--- a/src/slic3r/Utils/Http.cpp
+++ b/src/slic3r/Utils/Http.cpp
@@ -314,7 +314,7 @@ void Http::priv::set_put_body(const fs::path &path)
 	boost::system::error_code ec;
 	boost::uintmax_t filesize = file_size(path, ec);
 	if (!ec) {
-        putFile = std::make_unique<fs::ifstream>(path);
+        putFile = std::make_unique<fs::ifstream>(path, std::ios::binary);
         ::curl_easy_setopt(curl, CURLOPT_READDATA, (void *) (putFile.get()));
 		::curl_easy_setopt(curl, CURLOPT_INFILESIZE, filesize);
 	}