diff --git a/scad/bed.scad b/scad/bed.scad
index 8475842..3efa1fb 100644
--- a/scad/bed.scad
+++ b/scad/bed.scad
@@ -34,16 +34,16 @@ module bed_assembly() {
         translate([0,0, pillar_height(bed_pillars) + pcb_thickness / 2])
             color(bed_color) cube([bed_width, bed_depth, pcb_thickness], center = true);
 
-        translate([0,0, pillar_height(bed_pillars) + pcb_thickness + sheet_thickness(glass) / 2 + eta * 3])
-            sheet(glass, bed_width, bed_depth - 12);
+        translate([0,0, pillar_height(bed_pillars) + pcb_thickness + sheet_thickness(bed_glass) / 2 + eta * 3])
+            sheet(bed_glass, bed_width, bed_depth - 12);
 
         for(x = [-1, 1])
             for(y = [-1,1])
                 translate([bed_width / 2 * x,
                            ((bed_depth - bulldog_length(small_bulldog)) / 2 - washer_diameter(M3_washer)) * y,
-                           pillar_height(bed_pillars) + (pcb_thickness + sheet_thickness(glass))/ 2])
+                           pillar_height(bed_pillars) + (pcb_thickness + sheet_thickness(bed_glass))/ 2])
                     rotate([0, 0, 90 + x * 90])
-                        bulldog(small_bulldog, pcb_thickness + sheet_thickness(glass));
+                        bulldog(small_bulldog, pcb_thickness + sheet_thickness(bed_glass));
     }
 
     end("bed_assembly");
diff --git a/scad/conf/config.scad b/scad/conf/config.scad
index a8bf8dc..499ff44 100644
--- a/scad/conf/config.scad
+++ b/scad/conf/config.scad
@@ -16,8 +16,6 @@ eta = 0.01;                     // small fudge factor to stop CSG barfing on coi
 $fa = 5;
 $fs = 0.5;
 
-glass_thickness = 2;
-
 //
 // Hole sizes
 //
diff --git a/scad/conf/huxley_config.scad b/scad/conf/huxley_config.scad
index 632c332..06fe782 100644
--- a/scad/conf/huxley_config.scad
+++ b/scad/conf/huxley_config.scad
@@ -23,7 +23,8 @@ Z_travel = 110;
 bed_depth = 150;
 bed_width = 150;
 bed_pillars = M3x20_pillar;
-bed_thickness = 1.6 + sheet_thickness(glass);    // PCB heater plus glass sheet
+bed_glass = glass2;
+bed_thickness = 1.6 + sheet_thickness(bed_glass);    // PCB heater plus glass sheet
 bed_holes = 146;
 
 base = PMMA10;               // Sheet material used for the base. Needs to be thick enough to screw into.
diff --git a/scad/conf/mendel_config.scad b/scad/conf/mendel_config.scad
index af93445..ad867e6 100644
--- a/scad/conf/mendel_config.scad
+++ b/scad/conf/mendel_config.scad
@@ -23,7 +23,8 @@ Z_travel = 140;
 bed_depth = 214;
 bed_width = 214;
 bed_pillars = M3x20_pillar;
-bed_thickness = 1.6 + sheet_thickness(glass);    // PCB heater plus glass sheet
+bed_glass = glass2;
+bed_thickness = 1.6 + sheet_thickness(bed_glass);    // PCB heater plus glass sheet
 bed_holes = 209;
 
 base = PMMA10;               // Sheet material used for the base. Needs to be thick enough to screw into.
diff --git a/scad/conf/sturdy_config.scad b/scad/conf/sturdy_config.scad
index bd1270f..e49dab4 100644
--- a/scad/conf/sturdy_config.scad
+++ b/scad/conf/sturdy_config.scad
@@ -23,7 +23,8 @@ Z_travel = 150;
 bed_depth = 214;
 bed_width = 214;
 bed_pillars = M3x20_pillar;
-bed_thickness = 1.6 + sheet_thickness(glass);    // PCB heater plus glass sheet
+bed_glass = glass2;
+bed_thickness = 1.6 + sheet_thickness(bed_glass);    // PCB heater plus glass sheet
 bed_holes = 209;
 
 base = MDF12;
diff --git a/scad/vitamins/sheet.scad b/scad/vitamins/sheet.scad
index fda19c6..90fe301 100644
--- a/scad/vitamins/sheet.scad
+++ b/scad/vitamins/sheet.scad
@@ -13,15 +13,15 @@
 
 // The "Color" parameter is a quad-array: [R, G, B, Alpha]
 
-//		   [ Code, Description, Thickness, Color, Soft]
+//         [ Code, Description, Thickness, Color, Soft]
 
-MDF6     = [ "MD", "MDF sheet",     6, MDF_brown, true];	// ~1/4"
-MDF10    = [ "MD", "MDF sheet",    10, MDF_brown, true];	// ~3/8"
-MDF12    = [ "MD", "MDF sheet",    12, MDF_brown, true];	// ~1/2"
-PMMA6    = [ "AC", "Acrylic sheet", 6, acrylic_clear, false];	// ~1/4"
-PMMA8    = [ "AC", "Acrylic sheet", 8, acrylic_clear, false];	// ~5/16"
-PMMA10   = [ "AC", "Acrylic sheet",10, acrylic_clear, false];	// ~3/8"
-glass    = [ "GL", "Glass sheet",   glass_thickness, glass_clear, false];
+MDF6     = [ "MD", "MDF sheet",     6, MDF_brown, true];    // ~1/4"
+MDF10    = [ "MD", "MDF sheet",    10, MDF_brown, true];    // ~3/8"
+MDF12    = [ "MD", "MDF sheet",    12, MDF_brown, true];    // ~1/2"
+PMMA6    = [ "AC", "Acrylic sheet", 6, acrylic_clear, false];   // ~1/4"
+PMMA8    = [ "AC", "Acrylic sheet", 8, acrylic_clear, false];   // ~5/16"
+PMMA10   = [ "AC", "Acrylic sheet",10, acrylic_clear, false];   // ~3/8"
+glass2   = [ "GL", "Glass sheet",   2, glass_clear, false];
 DiBond   = [ "DB", "Dibond sheet",  3, dibond_grey, false];
 
 function sheet_thickness(type) = type[2];