diff --git a/readme.md b/readme.md
index 0de8711..a8d3d76 100644
--- a/readme.md
+++ b/readme.md
@@ -4610,23 +4610,23 @@ Uses [fixing blocks](#fixing_block) and [corner blocks](#corner_block).
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|  48 | `insert(F1BM3)` |  Heatfit insert M3 |
-|  36 | `screw(M3_dome_screw, 10)` |  Screw M3 dome x 10mm |
+|  60 | `insert(F1BM3)` |  Heatfit insert M3 |
+|  44 | `screw(M3_dome_screw, 10)` |  Screw M3 dome x 10mm |
 |   4 | `screw(M3_dome_screw, 12)` |  Screw M3 dome x 12mm |
-|   8 | `screw(M3_dome_screw, 16)` |  Screw M3 dome x 16mm |
-|   2 | `sheet(DiBond, 303, 126)` |  Sheet DiBond 303mm x 126mm x 3mm |
-|   1 | `sheet(DiBond, 400, 126)` |  Sheet DiBond 400mm x 126mm x 3mm |
-|   1 | `sheet(DiBond6, 400, 300, 1)` |  Sheet DiBond 400mm x 300mm x 6mm |
-|   1 | `sheet(DiBond, 406, 129)` |  Sheet DiBond 406mm x 129mm x 3mm |
-|   1 | `sheet(PMMA3, 406, 303)` |  Sheet acrylic 406mm x 303mm x 3mm |
-|  48 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
-|  48 | `star_washer(M3_washer)` |  Washer star M3 x 0.5mm |
+|  12 | `screw(M3_dome_screw, 16)` |  Screw M3 dome x 16mm |
+|   2 | `sheet(DiBond, 203, 126)` |  Sheet DiBond 203mm x 126mm x 3mm |
+|   1 | `sheet(DiBond, 300, 126)` |  Sheet DiBond 300mm x 126mm x 3mm |
+|   1 | `sheet(DiBond6, 300, 200, 1)` |  Sheet DiBond 300mm x 200mm x 6mm |
+|   1 | `sheet(DiBond, 306, 129)` |  Sheet DiBond 306mm x 129mm x 3mm |
+|   1 | `sheet(PMMA3, 306, 203)` |  Sheet acrylic 306mm x 203mm x 3mm |
+|  60 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
+|  60 | `star_washer(M3_washer)` |  Washer star M3 x 0.5mm |
 
 ### Printed
 | Qty | Filename |
 | ---:|:--- |
 |   8 | corner_block_M30.stl |
-|   8 | fixing_block_M30.stl |
+|  12 | fixing_block_M30.stl |
 
 ### Routed
 | Qty | Filename |
@@ -4643,7 +4643,7 @@ Uses [fixing blocks](#fixing_block) and [corner blocks](#corner_block).
 | ---:|:--- |
 |   1 | bbox_assembly |
 |   8 | corner_block_M30_assembly |
-|   8 | fixing_block_M30_assembly |
+|  12 | fixing_block_M30_assembly |
 
 
 <a href="#top">Top</a>
diff --git a/tests/butt_box.scad b/tests/butt_box.scad
index d0d4754..3bdd43c 100644
--- a/tests/butt_box.scad
+++ b/tests/butt_box.scad
@@ -25,7 +25,7 @@ include <../printed/butt_box.scad>
 
 $explode = 0;
 
-box = bbox(screw = M3_dome_screw, sheets = DiBond, base_sheet = DiBond6, top_sheet = PMMA3, span = 250, size = [400, 300, 120]);
+box = bbox(screw = M3_dome_screw, sheets = DiBond, base_sheet = DiBond6, top_sheet = PMMA3, span = 150, size = [300, 200, 120]);
 
 module bbox_assembly() _bbox_assembly(box);
 
diff --git a/tests/png/butt_box.png b/tests/png/butt_box.png
index cff20d1..2436553 100644
Binary files a/tests/png/butt_box.png and b/tests/png/butt_box.png differ