diff --git a/doc/How to build - Windows.md b/doc/How to build - Windows.md
index b8829047bf..c2dc31ce31 100644
--- a/doc/How to build - Windows.md	
+++ b/doc/How to build - Windows.md	
@@ -120,3 +120,49 @@ Refer to the CMake scripts inside the `deps` directory to see which dependencies
 
 \*) Specifically, the problem arises when building boost. Boost build tool appends all build options into paths of
 intermediate files, which are not handled correctly by either `b2.exe` or possibly `ninja` (?).
+
+
+# Noob guide (step by step)
+
+Install Visual Studio Community 2019 from
+visualstudio.microsoft.com/vs/
+Select all workload options for C++ 
+
+Install git for Windows from
+gitforwindows.org
+download and run the exe accepting all defaults
+
+download PrusaSlicer-master.zip from github
+I downloaded this to c:\PrusaSlicer and unzipped to c:\PrusaSlicer\PrusaSlicer-master\ so this will be my prefix for all my steps. Substitute your prefix.
+
+Go to the Windows Start Menu and Click on "Visual Studio 2019" folder, then select the ->"x64 Native Tools Command Prompt" to open a command window
+
+cd c:\PrusaSlicer\PrusaSlicer-master\deps
+
+mkdir build
+
+cd build
+
+cmake .. -G "Visual Studio 16 2019" -DDESTDIR="c:\PrusaSlicer\PrusaSlicer-master"
+
+msbuild /m ALL_BUILD.vcxproj // This took 13.5 minutes on my machine: core I7-7700K @ 4.2Ghz with 32GB main memory and 20min on a average laptop
+
+cd c:\PrusaSlicer\PrusaSlicer-master\
+
+mkdir build
+
+cd build
+
+cmake .. -G "Visual Studio 16 2019" -DCMAKE_PREFIX_PATH="c:\PrusaSlicer\PrusaSlicer-master\usr\local"
+
+open Visual Studio for c++ development (VS asks this the first time you start it)
+
+Open->Project/Solution or File->Open->Project/Solution (depending on which dialog comes up first)
+
+click on c:\PrusaSlicer\PrusaSlicer-master\build\PrusaSlicer.sln
+
+Debug->Start Debugging or Debug->Start Without debugging
+PrusaSlicer should start. You're up and running!
+
+
+note: Thanks to @douggorgen for the original guide, as an answer for a issue 
diff --git a/src/libslic3r/Format/3mf.cpp b/src/libslic3r/Format/3mf.cpp
index 376b34ca8a..b485e83d86 100644
--- a/src/libslic3r/Format/3mf.cpp
+++ b/src/libslic3r/Format/3mf.cpp
@@ -87,6 +87,7 @@ const char* V3_ATTR = "v3";
 const char* OBJECTID_ATTR = "objectid";
 const char* TRANSFORM_ATTR = "transform";
 const char* PRINTABLE_ATTR = "printable";
+const char* INSTANCESCOUNT_ATTR = "instances_count";
 
 const char* KEY_ATTR = "key";
 const char* VALUE_ATTR = "value";
@@ -1613,6 +1614,9 @@ namespace Slic3r {
             return false;
         }
 
+        // Added because of github #3435, currently not used by PrusaSlicer
+        int instances_count_id = get_attribute_value_int(attributes, num_attributes, INSTANCESCOUNT_ATTR);
+
         m_objects_metadata.insert(IdToMetadataMap::value_type(object_id, ObjectMetadata()));
         m_curr_config.object_id = object_id;
         return true;
@@ -2495,7 +2499,8 @@ namespace Slic3r {
             const ModelObject* obj = obj_metadata.second.object;
             if (obj != nullptr)
             {
-                stream << " <" << OBJECT_TAG << " id=\"" << obj_metadata.first << "\">\n";
+                // Output of instances count added because of github #3435, currently not used by PrusaSlicer
+                stream << " <" << OBJECT_TAG << " " << ID_ATTR << "=\"" << obj_metadata.first << "\" " << INSTANCESCOUNT_ATTR << "=\"" << obj->instances.size() << "\">\n";
 
                 // stores object's name
                 if (!obj->name.empty())
diff --git a/src/slic3r/GUI/ConfigWizard.cpp b/src/slic3r/GUI/ConfigWizard.cpp
index 971bd1f1d3..265e7f203a 100644
--- a/src/slic3r/GUI/ConfigWizard.cpp
+++ b/src/slic3r/GUI/ConfigWizard.cpp
@@ -1605,7 +1605,27 @@ void ConfigWizard::priv::on_3rdparty_install(const VendorProfile *vendor, bool i
     load_pages();
 }
 
-bool ConfigWizard::priv::check_material_config(Technology technology)
+bool ConfigWizard::priv::on_bnt_finish()
+{
+    /* When Filaments or Sla Materials pages are activated, 
+     * materials for this pages are automaticaly updated and presets are reloaded.
+     * 
+     * But, if _Finish_ button was clicked without activation of those pages 
+     * (for example, just some printers were added/deleted), 
+     * than last changes wouldn't be updated for filaments/materials.
+     * SO, do that before close of Wizard
+     */
+    update_materials(T_ANY);
+    if (any_fff_selected)
+        page_filaments->reload_presets();
+    if (any_sla_selected)
+        page_sla_materials->reload_presets();
+
+    // check, that there is selected at least one filament/material
+    return check_materials_in_config(T_ANY);
+}
+
+bool ConfigWizard::priv::check_materials_in_config(Technology technology)
 {
     const auto exist_preset = [this](const std::string& section, const Materials& materials)
     {
@@ -1899,16 +1919,15 @@ ConfigWizard::ConfigWizard(wxWindow *parent)
         // check, that there is selected at least one filament/material
         ConfigWizardPage* active_page = this->p->index->active_page();
         if ( (active_page == p->page_filaments || active_page == p->page_sla_materials)
-            && !p->check_material_config(dynamic_cast<PageMaterials*>(active_page)->materials->technology))
+            && !p->check_materials_in_config(dynamic_cast<PageMaterials*>(active_page)->materials->technology))
             return;
         this->p->index->go_next();
     });
 
     p->btn_finish->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &)
     {
-        if (!p->check_material_config(T_ANY))
-            return;
-        this->EndModal(wxID_OK);
+        if (p->on_bnt_finish())
+            this->EndModal(wxID_OK);
     });
 
     p->btn_sel_all->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &) {
diff --git a/src/slic3r/GUI/ConfigWizard_private.hpp b/src/slic3r/GUI/ConfigWizard_private.hpp
index fc91909e71..a90832a3fc 100644
--- a/src/slic3r/GUI/ConfigWizard_private.hpp
+++ b/src/slic3r/GUI/ConfigWizard_private.hpp
@@ -489,7 +489,8 @@ struct ConfigWizard::priv
     void on_printer_pick(PagePrinters *page, const PrinterPickerEvent &evt);
     void on_3rdparty_install(const VendorProfile *vendor, bool install);
 
-    bool check_material_config(Technology technology);
+    bool on_bnt_finish();
+    bool check_materials_in_config(Technology technology);
     void apply_config(AppConfig *app_config, PresetBundle *preset_bundle, const PresetUpdater *updater);
     // #ys_FIXME_alise
     void update_presets_in_config(const std::string& section, const std::string& alias_key, bool add);
diff --git a/src/slic3r/GUI/Mouse3DController.cpp b/src/slic3r/GUI/Mouse3DController.cpp
index ad5be88d8c..a4c9ef2554 100644
--- a/src/slic3r/GUI/Mouse3DController.cpp
+++ b/src/slic3r/GUI/Mouse3DController.cpp
@@ -311,11 +311,11 @@ void Mouse3DController::render_settings_dialog(unsigned int canvas_width, unsign
             ImGui::PopStyleColor();
 
             float translation_scale = (float)m_state.get_translation_scale() / State::DefaultTranslationScale;
-            if (imgui.slider_float(_(L("Translation")) + "##1", &translation_scale, 0.5f, 2.0f, "%.1f"))
+            if (imgui.slider_float(_(L("Translation")) + "##1", &translation_scale, 0.5f, 5.0f, "%.1f"))
                 m_state.set_translation_scale(State::DefaultTranslationScale * (double)translation_scale);
 
             float rotation_scale = m_state.get_rotation_scale() / State::DefaultRotationScale;
-            if (imgui.slider_float(_(L("Rotation")) + "##1", &rotation_scale, 0.5f, 2.0f, "%.1f"))
+            if (imgui.slider_float(_(L("Rotation")) + "##1", &rotation_scale, 0.5f, 5.0f, "%.1f"))
                 m_state.set_rotation_scale(State::DefaultRotationScale * rotation_scale);
 
             ImGui::Separator();