This is Thing-a-Week #3, previous things can be found here. http://www.iheartrobotics.com/search/label/thing-a-week
This is version 0.0 of a modular case for an Arduino and other electronics projects. After testing I am going to look into getting the pieces injection molded in bulk.
They are designed to fit 6 across in a 1U Rack, or 4 across turned the other way.
There is room for most shields, and space in the front of the case for a display circuit board. The end piece with a cutout is designed to hold a 3mm thick plate you can laser or hacksaw out of acrylic, wood or whatever.
I think the Makerbot versions should work if your printer has problems with overhangs. Let me know if I forgot anything.
Feedback is greatly appreciated.