diff --git a/resources/profiles/QIDITechnology.ini b/resources/profiles/QIDITechnology.ini
index 411a61e..b6db4d3 100644
--- a/resources/profiles/QIDITechnology.ini
+++ b/resources/profiles/QIDITechnology.ini
@@ -343,7 +343,7 @@ bed_temperature = 90
 enable_auxiliary_fan = 0
 enable_volume_fan = 40
 extrusion_multiplier = 0.95
-filament_colour = #FFC800
+filament_colour = #FFFACD
 filament_density = 1.02
 filament_max_volumetric_speed = 22
 filament_type = ABS
@@ -399,7 +399,7 @@ bed_temperature = 90
 enable_auxiliary_fan = 0
 enable_volume_fan = 40
 extrusion_multiplier = 0.95
-filament_colour = #FFC800
+filament_colour = #F0E68C
 filament_density = 1.02
 filament_max_volumetric_speed = 22
 filament_type = ABS
diff --git a/resources/web/guide/img/MakerWorld.png b/resources/web/guide/img/MakerWorld.png
new file mode 100644
index 0000000..e615c1d
Binary files /dev/null and b/resources/web/guide/img/MakerWorld.png differ
diff --git a/resources/web/guide/index.html b/resources/web/guide/index.html
index 867e5ec..d20a5c5 100644
--- a/resources/web/guide/index.html
+++ b/resources/web/guide/index.html
@@ -212,6 +212,8 @@
 		<div class="IntroduceBoard" board="ModelDownload">
 			<div class="IntroduceTitle trans" tid="t13"></div>
 			<div class="IntroduceTextBold trans" tid="l1"></div>
+			<div class="IntroduceText">https://makerworld.com</div>
+			<div class="AutozoomImage"><img src="img/MakerWorld.png"/></div>
 			<div class="IntroduceText">https://www.thingiverse.com</div>
 			<div class="AutozoomImage"><img src="img/thingiverse.png"/></div>
 			<div class="IntroduceText">https://www.printables.com/model</div>
diff --git a/src/libslic3r/GCode/CoolingBuffer.cpp b/src/libslic3r/GCode/CoolingBuffer.cpp
index d7dd59f..83135e4 100644
--- a/src/libslic3r/GCode/CoolingBuffer.cpp
+++ b/src/libslic3r/GCode/CoolingBuffer.cpp
@@ -39,6 +39,9 @@ void CoolingBuffer::reset(const Vec3d &position)
     m_current_pos[2] = float(position.z());
     m_current_pos[4] = float(m_config.travel_speed.value);
     m_fan_speed = -1;
+//Y12
+    m_fan_speed = -1;
+    m_fan_speed = -1;
 }
 
 struct CoolingLine
@@ -807,15 +810,23 @@ std::string CoolingBuffer::apply_layer_cooldown(
         }
         //B15 //B39
         if (int(layer_id) == disable_rapid_cooling_fan_first_layers) {
-            std::ostringstream fan_gcode;
-            fan_gcode << "M106 P2 S" << 255.0 * enable_auxiliary_fan / 100.0 << "\n";
-            new_gcode += fan_gcode.str();
+            int auxiliary_fan_speed_new = 255 * enable_auxiliary_fan / 100;
+            if (auxiliary_fan_speed_new != m_auxiliary_fan_speed) {
+                std::ostringstream fan_gcode;
+                m_auxiliary_fan_speed = auxiliary_fan_speed_new;
+                fan_gcode << "M106 P2 S" << auxiliary_fan_speed_new << "\n";
+                new_gcode += fan_gcode.str();
+            }
         }
         //B25
         if (int(layer_id) == disable_fan_first_layers) {
-            std::ostringstream fan_gcode;
-            fan_gcode << "M106 P3 S" << 255.0 * enable_volume_fan / 100.0 << "\n";
-            new_gcode += fan_gcode.str();
+            int volume_fan_speed_new = 255 * enable_volume_fan / 100;
+            if (volume_fan_speed_new != m_volume_fan_speed) {
+                std::ostringstream fan_gcode;
+                m_volume_fan_speed = volume_fan_speed_new;
+                fan_gcode << "M106 P3 S" << volume_fan_speed_new << "\n";
+                new_gcode += fan_gcode.str();
+            }
         }
 
         if (fan_speed_new != m_fan_speed) {
diff --git a/src/libslic3r/GCode/CoolingBuffer.hpp b/src/libslic3r/GCode/CoolingBuffer.hpp
index 91a81c7..85b3ed3 100644
--- a/src/libslic3r/GCode/CoolingBuffer.hpp
+++ b/src/libslic3r/GCode/CoolingBuffer.hpp
@@ -45,6 +45,9 @@ private:
     std::vector<float>          m_current_pos;
     // Current known fan speed or -1 if not known yet.
     int                         m_fan_speed;
+//Y12
+    int                         m_auxiliary_fan_speed;
+    int                         m_volume_fan_speed;
     // Cached from GCodeWriter.
     // Printing extruder IDs, zero based.
     std::vector<unsigned int>   m_extruder_ids;