Sliding Lid Box

Electronic project boxes always seem to be the wrong size, and it always seems harder than necessary to fit PCBs. This box is something I always wanted!
You can set the outside dimensions, wall thickness, up to three levels of PCB support, up to 2 pairs of screws and specify apertures in the top and one end.
Apertures are useful for button or switch access, LCD views, cables or LEDs.
Because the end of the box is open, maximum access is available, and both the PCBs and the Lid can slide in together.
The box has rounded side edges, which feel nice in the hand.

Updated to V1.1 21st August 2011, for better accuracy in larger wall thicknesses.

Updated to v1.2. See http://www.thingiverse.com/thing:13979