Snap-together clamshell housing for openSip+Puff

This is a snap-together chamshell housing for an open-source sip-and-puff interface I'm working on called [openSip+Puff](http://jason-webb.info/wiki/index.php?title=OpenSip%2BPuff).

The housing is comprised of two halves that fit together using mating ledges that are offset by about 0.2mm.

It was created in OpenSCAD and is fully parametric, so if you need to adjust the fit (or anything else for that matter) just grab the .scad file and have at it!

The OpenSCAD script relies on the foll