diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 85a6f45..40313bd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,7 +9,8 @@ Build_STL:
     - openscad -o horizontal_angle_bracket.stl horizontal_angle_bracket.scad
     - openscad -o ZMotorHalter.stl ZMotorHalter.scad
     - openscad -o SliderRight.stl SliderRight.scad
-    - openscad -o Slider.stl Slider.scad
+    - openscad -o Slider_back.stl Slider_back.scad
+    - openscad -o Slider_front.stl Slider_front.scad
   artifacts:
     expire_in: 2 days
     paths:
diff --git a/Slider.scad b/Slider_back.scad
similarity index 81%
rename from Slider.scad
rename to Slider_back.scad
index 77cf372..d169aac 100644
--- a/Slider.scad
+++ b/Slider_back.scad
@@ -1,30 +1,13 @@
 use <Holes.scad>;
+include <Slider_dims.scad>;
 
-$fn=75;
-
-// distance between two rods
-holeDist=65;
-
-// diameter of rod sticks
-rodDiameter=8;
-
-// overall height
-heightMain=90;
-
-width=60;
-depth=10;
-
-bearingLength=24;
-bearingDiam=15;
-
-twoRodSize=2.2;
-middleCylinderRad=2.5;
-middleCylinderOuterRad=4;
-
-rollWithRodDist=13.6; // rolle mit rod drauf
 
 difference() {
-    body();
+    union() {
+        body();
+        zcube();
+    }
+    
 
     dist=(heightMain-holeDist)/2;
     translate([0,0,dist])  bearingHalfHole();
@@ -47,12 +30,15 @@ module body() {
         cube([width-edgeRound*2, depth/2, heightMain-edgeRound*2]);
         rotate([-90, 0, 0]) cylinder(r=edgeRound,h=depth/2);
     }
- 
+}
+
+// add the offset cube with the triangle to have space for the belts in it
+module zcube() {
     cubez=heightMain/2-rollWithRodDist;
     translate([0, -5, cubez]) cube([width, 5, rollWithRodDist]);
 
     // the bottom triangle
-    translate([0, 0, cubez]) rotate([-90,0,-90]) linear_extrude(width) #polygon([[0,0],[5,0],[0,5]]);    
+    translate([0, 0, cubez]) rotate([-90,0,-90]) linear_extrude(width) #polygon([[0,0],[5,0],[0,5]]);  
 }
 
 module bearingHalfHole() {
@@ -79,22 +65,22 @@ module beltHolder() {
 }
 
 module MountHoles() {
-    translate([10,0,65]) {
+    translate([holeLeftRightMargin,0,holeTop]) {
         rotate([0,0,90]) #M3Hole(10);
         translate([0,5,0]) rotate([0,0,90]) M3Nut(5);
     } 
-    translate([width-10,0,65]) {
+    translate([width-holeLeftRightMargin,0,holeTop]) {
         rotate([0,0,90]) #M3Hole(10);
         translate([0,5,0]) rotate([0,0,90]) M3Nut(5);
     } 
 
 
-    translate([10,0,30]) {
+    translate([holeLeftRightMargin,0,holeBottom]) {
         translate([0,-5,0]) rotate([0,0,90]) #M3Hole(15);
         translate([0,5,0]) rotate([0,0,90]) M3Nut(10);
     }
 
-    translate([width-10,0,30]) {
+    translate([width-holeLeftRightMargin,0,holeBottom]) {
         translate([0,-5,0]) rotate([0,0,90]) #M3Hole(15);
         translate([0,5,0]) rotate([0,0,90]) M3Nut(10);
     }
diff --git a/Slider_dims.scad b/Slider_dims.scad
new file mode 100644
index 0000000..2614130
--- /dev/null
+++ b/Slider_dims.scad
@@ -0,0 +1,28 @@
+$fn=75;
+
+// distance between two rods
+holeDist=65;
+
+// diameter of rod sticks
+rodDiameter=8;
+
+// overall height
+heightMain=90;
+
+width=60;
+depth=10;
+
+bearingLength=24;
+bearingDiam=15;
+
+twoRodSize=2.2;
+middleCylinderRad=2.5;
+middleCylinderOuterRad=4;
+
+rollWithRodDist=13.6; // rolle mit rod drauf
+
+
+// hole positions
+holeLeftRightMargin=10;
+holeBottom=30;
+holeTop=65;
\ No newline at end of file
diff --git a/Slider_front.scad b/Slider_front.scad
new file mode 100644
index 0000000..5522485
--- /dev/null
+++ b/Slider_front.scad
@@ -0,0 +1,29 @@
+use <Slider_back.scad>
+use <Holes.scad>
+include <Slider_dims.scad>
+
+difference() {
+    translate([0,-10,0]) body();
+
+    dist=(heightMain-holeDist)/2;
+    translate([0,0,dist])  bearingHalfHole();
+    translate([0,0,dist+holeDist]) bearingHalfHole();
+
+    zcube();
+
+    cubecenter=heightMain/2-rollWithRodDist/2;
+    translate([0, -5, heightMain/2]) cube([width, 5, rollWithRodDist]);
+
+    // add the 4 mountholes
+    translate([0, -5, 0]) MountHolesFront();
+}
+
+// Similar function from Slider_back without the hexagonal holes
+module MountHolesFront() {
+    translate([holeLeftRightMargin,-5,holeTop]) rotate([0,0,90]) #M3Hole(10);
+    translate([width-holeLeftRightMargin,-5,holeTop]) rotate([0,0,90]) #M3Hole(10);
+
+
+    translate([holeLeftRightMargin,-5,holeBottom]) rotate([0,0,90]) #M3Hole(10);
+    translate([width-holeLeftRightMargin,-5,holeBottom])  rotate([0,0,90]) #M3Hole(10);
+}
\ No newline at end of file