diff --git a/Slider.scad b/Slider.scad
index c784a76..874999b 100644
--- a/Slider.scad
+++ b/Slider.scad
@@ -1,3 +1,74 @@
-$fn=50;
+$fn=75;
 
-cube();
+// 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();
+
+    dist=(heightMain-holeDist)/2;
+    translate([0,0,dist])  bearingHalfHole();
+    translate([0,0,dist+holeDist]) bearingHalfHole();
+
+    cubecenter=heightMain/2-rollWithRodDist/2;
+    translate([0, 0, heightMain/2]) cube([width, 5, rollWithRodDist]);
+
+    translate([0, -5, cubecenter]) beltHolder();
+    translate([width, -5, cubecenter]) rotate([0, 180, 0]) beltHolder();
+}
+
+module body() {
+    edgeRound=1.5;
+ 
+    translate([edgeRound, 0, edgeRound]) minkowski() {
+        cube([width-edgeRound*2, depth/2, heightMain-edgeRound*2]);
+        rotate([-90, 0, 0]) cylinder(r=edgeRound,h=depth/2);
+    }
+ 
+    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]]);    
+}
+
+module bearingHalfHole() {
+    sideDist=3;
+
+    rotate([0, 90, 0]) cylinder(h = width, d = 8+1); // we are defining +1mm to fit the rod in the hole...
+    translate([sideDist,0,0]) rotate([0, 90, 0]) cylinder(h = bearingLength, d = bearingDiam);
+    translate([width-bearingLength-sideDist,0,0]) rotate([0, 90, 0]) cylinder(h = bearingLength, d = bearingDiam);
+}
+
+module beltHolder() {
+    translate([0, 0, -twoRodSize/2]) {
+        cube([17, 10, twoRodSize]);
+        translate([20, 0, twoRodSize/2]) rotate([-90, 0, 0]) difference() {
+            hull() {
+                cylinder(r=middleCylinderOuterRad, h=10);
+                #translate([-5, 0, 0]) #cylinder(r=1, h=10);
+                
+            }
+            
+            cylinder(r=middleCylinderRad, h=10);
+        }
+    }
+}