Parametric Makerbot Watch Case

This is the output of an OpenSCAD script that generates a case for the prototype Makerbot Watch (http://www.thingiverse.com/thing:1254)

I was one of the lucky ones quick enough to get a prototype Makerbot Watch, and after assembling and programming it, I never have managed to get a case lasercut for it. I patterned the overall design around the multi-layer wristwatch/pocket watch design included with the Watch entry, but did this one parametrically so I could fiddle with various design aspec