Custom OUYA case remix

A subtle remix of dirtsky's elegant OUYA case, this design adds grooves along the bottom of the case to allow ventilation. I also added a variant of the case top without the "OUYA" text for a more minimalistic look.

Depending on your OUYA device rev, the cooling fan screw heads may sit a bit proud and interfere, but a quick targeted sanding to ease those areas in the lid made it fit.

Don't judge the waviness of the print - my printer needs new bearings and some realignment. And I was printing impatiently fast. :) But a first attempt at a mid-print filament swap worked out very well.