Rubber Feet for Printrbot Simple Metal

This is a foot I designed for my Printrbot. It uses rubber bike tubes, one of my favorite materials, to reduce vibration and grip the table. The foot has some spring to it as well, further reducing vibration.

Note: There's a slight difference between the files I uploaded and what's shown in the picture. The feet I printed were a little too flexible in the spring, causing the printer to bounce around a little more than I'd like. My uploaded file has the spring tightened a bit so it moves less.