Spool Holder for Printrbot Simple Metal

One of the first projects we made when we set up the Fab Lab. We scoured the internet for spool holders, but were generally unhappy with what we found. Many of them were very flimsy, difficult to print, or simply looked ugly. So, naturally, we designed our own!
We cut the chassis from both 6mm corrugated cardboard 5mm wood. We think the wood is much classier, but either will work. The axle was printed on the Printrbot and requires no support material or brim (just be mindful of the curling tha