diff --git a/MKS Gen L v1.0/Case-Bottom.stl b/MKS Gen L v1.0/Case-Bottom.stl
new file mode 100644
index 0000000..c927e9e
Binary files /dev/null and b/MKS Gen L v1.0/Case-Bottom.stl differ
diff --git a/MKS Gen L v1.0/Case.scad b/MKS Gen L v1.0/Case.scad
index f8c52c6..c0176d1 100755
--- a/MKS Gen L v1.0/Case.scad	
+++ b/MKS Gen L v1.0/Case.scad	
@@ -1,72 +1,163 @@
-
 // MKS Gen L v1.0
-width=110;
-depth=84;
-height=25;
-thickness=2;
-mount_peg=3;
-spacing=2;
+width = 110;
+depth = 84;
+height = 25;
+thickness = 3;
+mount_peg = 3;
+spacing = 10;
 
-peg_up=3;
-peg_bottom=8;
-pcb_thickness=1.5;
+peg_up = 3;
+peg_bottom = 8;
+pcb_thickness = 1.5;
+screw_size = height - thickness; // 10;
 
 // 
-$fn=100;
+$fn = 100;
 
-base(mount_peg);
-walls();
+//bottom_part();
 
-color("green") {
+top_part();
+
+
+module bottom_part() {
+    union() {
+        base();
+        walls();
+        screw_mounts();
+    }
 }
 
-module base(d1){
-    x = width + 2*spacing;
-    y = depth + 2*spacing;
-    
+module top_part() {
+    x = width + 2 * spacing;
+    y = depth + 2 * spacing;
+
+    d = (peg_up + 2) / 2 + 2;
+    h = height - thickness + 2;
+
+    difference() {
+        translate([0, 0, height - thickness])
+            cube([x, y, thickness]);
+
+        screw_cutoff();
+
+        translate([x - 8, 0, 0])
+            screw_cutoff();
+        translate([0, y - 8, 0])
+            screw_cutoff();
+        translate([x - 8, y - 8, 0])
+            screw_cutoff();
+    }
+}
+
+module screw_mounts() {
+    d = (peg_up) + 1;
+    x = width + 2 * spacing - 4;
+    y = depth + 2 * spacing - 4;
+
+    h = 0; //height - (screw_size + thickness);
+
+    translate([d, d, h])
+        rotate([0, 0, 180])
+            screw_mount();
+
+    translate([x, d, h])
+        rotate([0, 0, - 90])
+            screw_mount();
+
+    translate([d, y, h])
+        rotate([0, 0, 90])
+            screw_mount();
+
+    translate([x, y, h])
+        screw_mount();
+}
+
+
+module screw_mount() {
+    difference() {
+        union() {
+            cylinder(h = screw_size, d = peg_up + 3);
+            translate([0, - peg_up, 0])
+                cube([peg_up * 2, peg_up * 2, screw_size]);
+            translate([- peg_up, 0, 0])
+                cube([peg_up * 2, peg_up * 2, screw_size]);
+        }
+        translate([0, 0, - screw_size * 0.1])
+            cylinder(h = screw_size * 1.3, d = peg_up);
+    }
+}
+
+module base() {
+    d1 = mount_peg;
+    x = width + 2 * spacing;
+    y = depth + 2 * spacing;
+
     cube([x, y, thickness]);
-    translate([4 + spacing , 4 + spacing, thickness]) 
-        peg(h= thickness);
-    translate([x-(4+spacing), 4 + spacing, thickness])
-        peg(h= thickness);
-    translate([x-(4+spacing), y-(4+spacing), thickness])
-        peg(h= thickness);
-    translate([(4+spacing), y-(4+spacing), thickness])
-        peg(h= thickness);
+    translate([4 + spacing, 4 + spacing, thickness])
+        peg(h = thickness);
+    translate([x - (4 + spacing), 4 + spacing, thickness])
+        peg(h = thickness);
+    translate([x - (4 + spacing), y - (4 + spacing), thickness])
+        peg(h = thickness);
+    translate([(4 + spacing), y - (4 + spacing), thickness])
+        peg(h = thickness);
 }
 
-module walls(){
+module walls() {
     difference() {
         walls_basic();
-        
-        // power ports
-        translate([0,0,thickness+ pcb_thickness]){
-            translate([-spacing*1.5, 9, 5])
-                cube([spacing*2, 10.5, 13]);
-            translate([-spacing*1.5, 21, 5])
-                cube([spacing*2, 10.5, 13]);
-            translate([-spacing*1.5, 32, 5])
-                cube([spacing*2, 21, 6]);
-        }
-    }
 
+        // power ports
+        translate([0, 0, thickness + pcb_thickness]) {
+            translate([- spacing * 1.5, 9, 5])
+                cube([spacing * 2, 10.5, 13]);
+            translate([- spacing * 1.5, 21, 5])
+                cube([spacing * 2, 10.5, 13]);
+            translate([- spacing * 1.5, 32, 5])
+                cube([spacing * 2, 21, 6]);
+        }
+
+        // usb
+        translate([0, 0, thickness + pcb_thickness]) {
+            translate([21, - spacing * 1.5, 5])
+                cube([12, spacing * 2, 11]);
+        }
+
+        // holes for mounts
+        translate([30, depth + thickness * 3.5, thickness + 10])
+            rotate([90, 0, 0])
+                cylinder(h = thickness * 2, d = 3);
+        translate([width - 30, depth + thickness * 3.5, thickness + 10])
+            rotate([90, 0, 0])
+                cylinder(h = thickness * 2, d = 3);
+    }
 }
 
-module walls_basic(){
-    x = width + 2*spacing;
-    y = depth + 2*spacing;
-    
-    translate([0,-thickness,0])
+module walls_basic() {
+    x = width + 2 * spacing;
+    y = depth + 2 * spacing;
+
+    translate([0, - thickness, 0])
         cube([x, thickness, height]);
-    translate([0,y,0])
+    translate([0, y, 0])
         cube([x, thickness, height]);
-    translate([x,-thickness,0])
-        cube([thickness,y + 2 * thickness, height]);
-    translate([-thickness,-thickness,0])
-        cube([thickness,y + 2* thickness, height]);
+    translate([x, - thickness, 0])
+        cube([thickness, y + 2 * thickness, height]);
+    translate([- thickness, - thickness, 0])
+        cube([thickness, y + 2 * thickness, height]);
 }
 
 module peg(h) {
     cylinder(h = h, d = peg_bottom);
-    cylinder(h = h *3, d = peg_up);
+    cylinder(h = h * 3, d = peg_up);
+}
+
+module screw_cutoff() {
+    d = (peg_up + 5) / 2;
+    h = height - thickness + 2;
+
+    translate([d, d, h])
+        cylinder(h = 2, d1 = 3, d2 = 6);
+    translate([d, d, h - 2])
+        cylinder(h = 2, d = 3);
 }
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