diff --git a/cad/housing.scad b/cad/housing.scad
index 424c853..57b6b59 100644
--- a/cad/housing.scad
+++ b/cad/housing.scad
@@ -10,30 +10,53 @@ use <open_box.scad>
 /////////////////////////////////////////////////////////////////////////////////
 // Vars
 /////////////////////////////////////////////////////////////////////////////////
-length = 50; 
-width = 80;
+allowance_pcb = 1;
+allowance_glass = 0.5;
+width = 50 + 2*allowance_pcb; 
+length = 80 + 2*allowance_pcb;
 height = 45;
-thickness = 10;
-allowance = 1;
+thickness = 5;
 lid_depth = 5;
-bolt_diameter = 4;
+bolt_diameter = 5.5;		// According to the Farnell datasheet
 bolt_spacing = 5;
-my_color = "SteelBlue";
+my_color = "DarkRed";
+glass_width = 26;
+glass_height = 2 + allowance_glass;
+
+difference(){
 
-union(){
 	// Using my open box module for creating a simple box 
 	color(my_color, 0.8)
-		open_box(length, width, height, thickness, allowance);
+		open_box(length, width, height, thickness);
+	
 	// Creating a depening for the lid
 	color(my_color, 0.9)
-	*translate([thickness/2, thickness/2, height])
-		cube([length + 2*allowance + thickness, width + 2*allowance + thickness, lid_depth]);	
-	// Cylindric holes for the PCB
-	*color(my_color, 1.0) translate([0, 0, thickness/2]){
-		translate([thickness + bolt_spacing, bolt_spacing + thickness, 0])
+	translate([thickness/2, thickness/2, height+1])
+		cube([length + thickness, width + thickness, lid_depth+1]);	
+	
+	// Cylindric holes for the PCBs
+	color(my_color, 1.0) translate([0, 0, thickness/2]){
+		translate([thickness + bolt_spacing, thickness + bolt_spacing, 0])
+			cylinder(r=bolt_diameter/2, h=thickness/2+1);
+		translate([length + thickness - bolt_spacing, thickness + bolt_spacing, 0])
+			cylinder(r=bolt_diameter/2, h=thickness/2+1);
+		translate([length + thickness - bolt_spacing, width + thickness - bolt_spacing, 0])
+			cylinder(r=bolt_diameter/2, h=thickness/2+1);
+		translate([thickness + bolt_spacing, width + thickness - bolt_spacing, 0])
 			cylinder(r=bolt_diameter/2, h=thickness/2+1);
 	}
-	*translate([0,0,0])
-	cube([90, thickness, 50]);
-
+	
+	color(my_color, 0.6) union(){
+		// Slots for glass slide
+		// Slot in the back
+		translate([length + thickness/2, thickness + (width - glass_width)/2, (height + thickness)/2])
+			cube([thickness, glass_width, glass_height]);
+		// Slot in the front
+		translate([-1, thickness + (width - glass_width)/2, (height + thickness)/2])
+			cube([thickness + 2, glass_width, glass_height]);
+	}
 }
+
+color(my_color, 0.8)
+translate([thickness/2, thickness/2, height + 10]) 
+import("lid.stl");
diff --git a/cad/open_box.scad b/cad/open_box.scad
index d8b087e..e94db61 100644
--- a/cad/open_box.scad
+++ b/cad/open_box.scad
@@ -5,16 +5,14 @@
 // Last modification: 	26.04.3017
 /////////////////////////////////////////////////////////////////////////////////
 
-module open_box(width, length, height, thickness, allowance)
+module open_box(width, length, height, thickness)
 {
 
 	/////////////////////////////////////////////////////////////////////////
 	// Vars
 	/////////////////////////////////////////////////////////////////////////
-	edge_rounding = 15;
+	edge_rounding = 8;
 	compensation = 2*abs(edge_rounding-thickness);
-	width = width + 2*allowance;
-	length = length + 2*allowance;
 
 	/////////////////////////////////////////////////////////////////////////
 	// Action