diff --git a/SliderLeft.scad b/SliderLeft.scad
index 63e2ffa..422dc0d 100644
--- a/SliderLeft.scad
+++ b/SliderLeft.scad
@@ -1,12 +1,14 @@
 M3HoleDiam = 3.4;
 
 MountSize = 40;
+BodyWidth = 60;
 
 $fn = 100;
 
 difference() {
     MainBody();
     M3MountHoles();
+    BottomZRodHoles();
 }
 
 module M3MountHoles(){
@@ -18,6 +20,20 @@ module M3MountHoles(){
     translate([0, MountSize-edgeDistance, MountSize-edgeDistance]) M3Hole(40);
 }
 
+module BottomZRodHoles(){
+    xcenter = 49;
+    ycenter = MountSize/2 - 10;
+    holedistance = 10.6;
+
+    translate([xcenter + holedistance/2, ycenter + holedistance/2, 0]) rotate([0,270,0]) M3Hole(5);
+    translate([xcenter - holedistance/2, ycenter + holedistance/2, 0]) rotate([0,270,0]) M3Hole(5);
+    translate([xcenter + holedistance/2, ycenter - holedistance/2, 0]) rotate([0,270,0]) M3Hole(5);
+    translate([xcenter - holedistance/2, ycenter - holedistance/2, 0]) rotate([0,270,0]) M3Hole(5);
+
+    // center hole
+    translate([xcenter, ycenter, 0]) rotate([0,0,0]) cylinder(h = 5, d = 10.1);
+}
+
 module M3Hole(thickness) {
     rotate([0, 90, 0])cylinder(h = thickness, d = M3HoleDiam);
 }
@@ -27,8 +43,13 @@ module MainBody() {
     cube([5, MountSize, MountSize]);
 
     // bottom frame plate
-    translate([5, 0,0 ]) cube([50, MountSize, 5]);
+    translate([5, 0,0 ]) cube([BodyWidth, MountSize, 5]);
 
     // motorholder plate
     translate([0, MountSize,0 ]) cube([40+5, 5, 40]);
+
+    // top rod holde
+    translate([BodyWidth, 10,5 ]) cube([5, 20, 30]);
+
+    translate([BodyWidth, 10, -35 ]) cube([5, 20, 35]);
 }