C.H.I.P Bumper

I wouldn't say this is nearly as convenient as the plastic shields __Next Thing__ offers for the __CHIP__, but if you need something a little more rugged and/or needs to be mounted, this should serve as a decent alternative.
The tolerances were kept fairly tight for the sake of the rubber filament it's intended for. Similarly, the tiny recess in the corner will let your screw of choice get a good grip. Even without it, the one I printed on my __M3D__ keeps a firm hold on the board and wouldn't