Customizable bit holder for 1/4" hex drive bits

(Note - full size version is printing now. It's a bit curled up at the edges on my printer, but should come out okay, so I figured I'd publish it here tonight before I forget.)

I made this to make a big holder for all my various drive bits in my toolbox.

The way it's customized is a bit different than other organizers -- you put in the max height and number of bits, and it computes the shape that can achieve that.