diff --git a/src/libslic3r/Layer.cpp b/src/libslic3r/Layer.cpp
index be586fc73..a21926596 100644
--- a/src/libslic3r/Layer.cpp
+++ b/src/libslic3r/Layer.cpp
@@ -122,8 +122,11 @@ void Layer::make_perimeters()
             LayerRegion* other_layerm = *it;
             const PrintRegionConfig &other_config = other_layerm->region()->config();
             
+			/// !!! add here the settings you want to be added in the per-object menu.
+			/// if you don't do that, objects will share the same region, and the same settings.
             if (config.perimeter_extruder   == other_config.perimeter_extruder
                 && config.perimeters        == other_config.perimeters
+                && config.only_one_perimeter_top == other_config.only_one_perimeter_top
                 && config.perimeter_speed   == other_config.perimeter_speed
                 && config.external_perimeter_speed == other_config.external_perimeter_speed
                 && config.gap_fill_speed    == other_config.gap_fill_speed
diff --git a/src/libslic3r/Print.cpp b/src/libslic3r/Print.cpp
index 83dfa0eab..cb25e714d 100644
--- a/src/libslic3r/Print.cpp
+++ b/src/libslic3r/Print.cpp
@@ -44,11 +44,11 @@ void Print::clear()
     m_model.clear_objects();
 }
 
-PrintRegion* Print::add_region()
-{
-    m_regions.emplace_back(new PrintRegion(this));
-    return m_regions.back();
-}
+//PrintRegion* Print::add_region()
+//{
+//    m_regions.emplace_back(new PrintRegion(this));
+//    return m_regions.back();
+//}
 
 PrintRegion* Print::add_region(const PrintRegionConfig &config)
 {
diff --git a/src/libslic3r/Print.hpp b/src/libslic3r/Print.hpp
index b5ebc4af3..d6879e6f5 100644
--- a/src/libslic3r/Print.hpp
+++ b/src/libslic3r/Print.hpp
@@ -64,7 +64,7 @@ private:
     Print             *m_print;
     PrintRegionConfig  m_config;
     
-    PrintRegion(Print* print) : m_refcnt(0), m_print(print) {}
+    //PrintRegion(Print* print) : m_refcnt(0), m_print(print) {}
     PrintRegion(Print* print, const PrintRegionConfig &config) : m_refcnt(0), m_print(print), m_config(config) {}
     ~PrintRegion() {}
 };
@@ -376,7 +376,7 @@ public:
 protected:
     // methods for handling regions
     PrintRegion*        get_region(size_t idx)        { return m_regions[idx]; }
-    PrintRegion*        add_region();
+    //PrintRegion*        add_region();
     PrintRegion*        add_region(const PrintRegionConfig &config);
 
     // Invalidates the step, and its depending steps in Print.
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 2ea97e460..725ee5025 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -482,6 +482,7 @@ bool PrintObject::invalidate_state_by_config_options(const std::vector<t_config_
             || opt_key == "external_perimeters_first"
             || opt_key == "perimeter_loop"
             || opt_key == "perimeter_loop_seam"
+            || opt_key == "only_one_perimeter_top"
             || opt_key == "no_perimeter_unsupported_algo") {
             steps.emplace_back(posPerimeters);
         } else if (
@@ -489,11 +490,8 @@ bool PrintObject::invalidate_state_by_config_options(const std::vector<t_config_
             || opt_key == "first_layer_height"
             || opt_key == "exact_last_layer_height"
             || opt_key == "raft_layers"
-            || opt_key == "slice_closing_radius") {
-            steps.emplace_back(posSlice);
-        }
-        else if (
-               opt_key == "clip_multipart_objects"
+            || opt_key == "slice_closing_radius"
+            || opt_key == "clip_multipart_objects"
             || opt_key == "elefant_foot_compensation"
             || opt_key == "support_material_contact_distance_type" 
             || opt_key == "support_material_contact_distance_top" 
diff --git a/src/slic3r/GUI/Preset.cpp b/src/slic3r/GUI/Preset.cpp
index a61b4a255..f4abeda03 100644
--- a/src/slic3r/GUI/Preset.cpp
+++ b/src/slic3r/GUI/Preset.cpp
@@ -414,7 +414,7 @@ const std::vector<std::string>& Preset::print_options()
         "over_bridge_flow_ratio", "clip_multipart_objects", "enforce_full_fill_volume", "external_infill_margin", "bridged_infill_margin",
         "elefant_foot_compensation", "xy_size_compensation", "hole_size_compensation", "threads", "resolution",
         "wipe_tower", "wipe_tower_x", "wipe_tower_y", "wipe_tower_width", "wipe_tower_rotation_angle", "wipe_tower_bridging",
-        "only_one_perimeter_top", "single_extruder_multi_material_priming", "compatible_printers", "compatible_printers_condition", "inherits", 
+        "single_extruder_multi_material_priming", "compatible_printers", "compatible_printers_condition", "inherits", 
         "infill_dense", "infill_dense_algo",
         "no_perimeter_unsupported_algo",
         "support_material_solid_first_layer"