Breadbox organization system with different size boxes for screw

SummaryThese boxes go really well with my breadbox drawer system: http://www.thingiverse.com/thing:853195. They are designed so you can fit a 5x3 grid in the breadboxes and have additional sub-boxes with 4 and 2 compartments for smaller parts. The wall-thickness of the boxes is 3mm so they should hold up to some wear. Feedback is always appreciated. Released through my company Northern Layers: http://northernlayers.com