diff --git a/ZSlider_top.scad b/ZSlider_top.scad
index 48e524b..c712bca 100644
--- a/ZSlider_top.scad
+++ b/ZSlider_top.scad
@@ -14,11 +14,30 @@ module roundcube(x,y,z,rad=5) {
     
 }
 
+module holes(args) {
+    translate([10,12.5,0]) rotate([0,-90,0]) {
+        M4Hole(10);
+        translate([5,0,0]) M4Head(5);
+        };
+
+    translate([39,36.5,0]) rotate([0,-90,0]) {
+        M4Hole(10);
+        translate([5,0,0]) M4Head(5);
+        };
+
+    translate([0,10,20]) #M4Hole(5);
+    translate([0,39,20]) #M4Hole(5);
+
+    translate([40.3 + 4.5,10,20]) #M4Hole(5);
+    translate([40.3 + 4.5,39,20]) #M4Hole(5);
+}
+
 module body() {
     difference(){
         translate([0,0,-9]) roundcube(49,49,9 + 10 + 18);
         translate([4.5,0,10]) cube([40.3,49,19]);
         translate([0,4.5,-9]) cube([49,40.3,9]);
+        holes();
     }
     
 }