FlexBox v2 in different sizes

V4 Version online and tested: http://www.thingiverse.com/thing:1363648

Little Box in different sizes as electronics case
... 30x30x30 means 3cm*3cm*3cm free room inside

V3 file added with a bit thicker walls where clips are placed.

This thing is not customizable, but if you require a special size, give me a hint and I might create a version for you.

Optimized for a 0.39mm nozzle and a .1 or layer height.