Nema 17 cooler

Inspired by http://www.thingiverse.com/thing:22449 and http://www.thingiverse.com/thing:43246. I made my own version of a 40mm fan adapter for Nema 17 motors to keep them cool. Air flows around 3 sides and 4th has an opening for the motor wires and has 2 pertrusions to make a snug fit so the cooler stays put.