diff --git a/resources/profiles/QIDITechnology.ini b/resources/profiles/QIDITechnology.ini
index e5eeada..a2ffa72 100644
--- a/resources/profiles/QIDITechnology.ini
+++ b/resources/profiles/QIDITechnology.ini
@@ -169,7 +169,7 @@ skirts = 0
 slice_closing_radius = 0.049
 slicing_mode = regular
 slow_down_layers = 0
-small_perimeter_speed = 100
+small_perimeter_speed = 70
 solid_infill_acceleration = 10000
 solid_infill_below_area = 15
 solid_infill_every_layers = 0
@@ -648,6 +648,7 @@ compatible_prints_condition =
 cooling = 1
 disable_fan_first_layers = 1
 disable_rapid_cooling_fan_first_layers = 3
+dont_slow_down_outer_wall = 1
 enable_advance_pressure = 1
 enable_auxiliary_fan = 100
 enable_auxiliary_fan_unseal = 0
diff --git a/src/libslic3r/GCode/CoolingBuffer.cpp b/src/libslic3r/GCode/CoolingBuffer.cpp
index f5befae..5a1ff6d 100644
--- a/src/libslic3r/GCode/CoolingBuffer.cpp
+++ b/src/libslic3r/GCode/CoolingBuffer.cpp
@@ -236,6 +236,8 @@ struct PerExtruderAdjustments
     float                       slowdown_below_layer_time = 0.f;
     // Minimum print speed allowed for this extruder.
     float                       min_print_speed     = 0.f;
+//Y28
+    bool                        dont_slow_down_outer_wall = true;
 
     // Parsed lines.
     std::vector<CoolingLine>    lines;
@@ -344,6 +346,8 @@ std::vector<PerExtruderAdjustments> CoolingBuffer::parse_layer_gcode(const std::
         adj.cooling_slow_down_enabled = m_config.cooling.get_at(extruder_id);
         adj.slowdown_below_layer_time = float(m_config.slowdown_below_layer_time.get_at(extruder_id));
         adj.min_print_speed           = float(m_config.min_print_speed.get_at(extruder_id));
+//Y28
+        adj.dont_slow_down_outer_wall = m_config.dont_slow_down_outer_wall.get_at(extruder_id);
         map_extruder_to_per_extruder_adjustment[extruder_id] = i;
     }
 
@@ -424,7 +428,12 @@ std::vector<PerExtruderAdjustments> CoolingBuffer::parse_layer_gcode(const std::
                 line.type |= CoolingLine::TYPE_EXTERNAL_PERIMETER;
             if (wipe)
                 line.type |= CoolingLine::TYPE_WIPE;
-            if (boost::contains(sline, ";_EXTRUDE_SET_SPEED") && ! wipe) {
+//Y28
+            bool adjust_external = true;
+            if (adjustment->dont_slow_down_outer_wall && external_perimeter)
+                adjust_external = false;
+
+            if (boost::contains(sline, ";_EXTRUDE_SET_SPEED") && ! wipe && adjust_external) {
                 line.type |= CoolingLine::TYPE_ADJUSTABLE;
                 active_speed_modifier = adjustment->lines.size();
             }
diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index b8296fe..b679e75 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -536,6 +536,8 @@ static std::vector<std::string> s_Preset_filament_options {
     "filament_shrink",
     //Y26
     "seal_print",
+    //Y28
+    "dont_slow_down_outer_wall",
     //w15
     "filament_wipe_distance"
 };
diff --git a/src/libslic3r/Print.cpp b/src/libslic3r/Print.cpp
index 26aefff..81b42ed 100644
--- a/src/libslic3r/Print.cpp
+++ b/src/libslic3r/Print.cpp
@@ -83,6 +83,8 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "disable_fan_first_layers",
         //B39
         "disable_rapid_cooling_fan_first_layers",
+        //Y28
+        "dont_slow_down_outer_wall",
         "duplicate_distance",
         "end_gcode",
         "end_filament_gcode",
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 41b724d..53e4894 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -2244,6 +2244,17 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloats { 0.07 });
 
+//Y28
+    def = this->add("dont_slow_down_outer_wall", coBools);
+    def->label = L("Don't slow down outer walls");
+    def->tooltip = L("If enabled, this setting will ensure external perimeters are not slowed down to meet the minimum layer time. "
+                     "This is particularly helpful in the below scenarios:\n\n "
+                     "1. To avoid changes in shine when printing glossy filaments \n"
+                     "2. To avoid changes in external wall speed which may create slight wall artefacts that appear like z banding \n"
+                     "3. To avoid printing at speeds which cause VFAs (fine artefacts) on the external walls\n\n");
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionBools { true });
+
     def = this->add("min_print_speed", coFloats);
     def->label = L("Min print speed");
     def->tooltip = L("Slic3r will not scale speed down below this speed.");
diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index 5ef16d2..df256f4 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -900,6 +900,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionInts,               min_fan_speed))
     ((ConfigOptionFloats,             min_layer_height))
     ((ConfigOptionFloat,              max_print_height))
+    //Y28
+    ((ConfigOptionBools,              dont_slow_down_outer_wall))
     ((ConfigOptionFloats,             min_print_speed))
     ((ConfigOptionFloat,              min_skirt_length))
     ((ConfigOptionString,             notes))
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 4ebf733..6fa3f83 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -2298,6 +2298,8 @@ void TabFilament::build()
         optgroup = page->new_optgroup(L("Cooling thresholds"), 25);
         optgroup->append_single_option_line("fan_below_layer_time", category_path + "cooling-thresholds");
         optgroup->append_single_option_line("slowdown_below_layer_time", category_path + "cooling-thresholds");
+//Y28
+        optgroup->append_single_option_line("dont_slow_down_outer_wall");
         optgroup->append_single_option_line("min_print_speed", category_path + "cooling-thresholds");
 
     page = add_options_page(L("Advanced"), "wrench");