diff --git a/buttons.scad b/buttons.scad
index e305e6b..c4a9bd0 100644
--- a/buttons.scad
+++ b/buttons.scad
@@ -45,7 +45,10 @@ bevel_size = 1;
 button_trigger_clearance = 0.4;
 
 // Dicke der Widerhaken der Schulterbuttons.
-button_trigger_rail = 2.75;
+button_trigger_hooks = 2.75;
+
+// Höhe der "Schienen" auf der Unterseite der Schulterbuttons.
+button_trigger_rails = 0.2;
 
 // Gesamthöhe der Systembuttons.
 system_height = space - button_system_size - button_clearance + top + protrusion;
@@ -82,13 +85,17 @@ module action_buttons() {
 // Schulter-Buttons.
 module trigger_button() {
     // Basis.
-    linear_extrude(height = button_trigger_rail) {
+    linear_extrude(height = button_trigger_hooks) {
         import("./svg/buttons trigger lower.svg");
     }
 
-    linear_extrude(height = space - button_trigger_clearance) {
+    linear_extrude(height = space - button_trigger_clearance - button_trigger_rails) {
         import("./svg/buttons trigger upper.svg");
     }
+
+    linear_extrude(height = space - button_trigger_clearance) {
+        import("./svg/buttons trigger rails.svg");
+    }
 }
 
 // System-Buttons.
diff --git a/svg/buttons trigger rails.svg b/svg/buttons trigger rails.svg
new file mode 100644
index 0000000..afaa263
--- /dev/null
+++ b/svg/buttons trigger rails.svg	
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="18.503187mm"
+   height="14.74995mm"
+   viewBox="0 0 18.503187 14.74995"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   sodipodi:docname="buttons trigger rails.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="mm"
+     inkscape:zoom="8.4223858"
+     inkscape:cx="35.263167"
+     inkscape:cy="28.317392"
+     inkscape:window-width="1438"
+     inkscape:window-height="880"
+     inkscape:window-x="0"
+     inkscape:window-y="16"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     showgrid="false" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-102.92292,-124.61875)">
+    <path
+       style="display:inline;fill:#ff80e5;fill-rule:evenodd;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 120.4232,127.3687 0.5,-0.5 0.5,0.5 v 9.75 l -0.5,0.5 -0.5,-0.5 z"
+       id="path538" />
+    <path
+       style="display:inline;fill:#ff80e5;fill-rule:evenodd;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 103.9232,127.3687 0.5,-0.5 0.5,0.5 v 9.75 l -0.5,0.5 -0.5,-0.5 z"
+       id="path540" />
+  </g>
+</svg>
diff --git a/svg/front construction.svg b/svg/front construction.svg
index 4bdf843..10ee7a9 100644
--- a/svg/front construction.svg	
+++ b/svg/front construction.svg	
@@ -5,7 +5,7 @@
    viewBox="0 0 150 110"
    version="1.1"
    id="svg8"
-   inkscape:version="1.3.2 (091e20ef0f, 2023-11-25, custom)"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
    sodipodi:docname="front construction.svg"
    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
@@ -46,8 +46,8 @@
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
      inkscape:zoom="9.5296451"
-     inkscape:cx="86.204679"
-     inkscape:cy="5.5615922"
+     inkscape:cx="84.997919"
+     inkscape:cy="14.218788"
      inkscape:document-units="mm"
      inkscape:current-layer="layer6"
      inkscape:document-rotation="0"
@@ -877,6 +877,14 @@
        xlink:href="#path7"
        id="use8"
        transform="matrix(-1,0,0,1,150.00023,4.4927446e-5)" />
+    <path
+       style="fill:#ff80e5;fill-rule:evenodd;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 30.749999,-2.25 0.500002,-0.5 0.499999,0.5 V 7.5 L 31.250001,7.9999998 30.749999,7.5 Z"
+       id="path538" />
+    <path
+       style="fill:#ff80e5;fill-rule:evenodd;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 14.249999,-2.25 0.500002,-0.5 0.499999,0.5 V 7.5 L 14.750001,7.9999998 14.249999,7.5 Z"
+       id="path540" />
   </g>
   <g
      inkscape:label="Front"