A one-piece replacement for the late 2013 Printrbot Simple's cord tensioners (normally assembled from laser-cut parts 21 and 22).

More details about the design of this part are posted here: http://anoved.net/2014/02/5458/

I printed in PLA with 3 walls, 3 top/bottom layers, and 0.4 honeycomb infill. I had to shave a little off the inside of the "arms" before they would fit around the laser-cut wood parts.