a lasercut top mount spooler

so being a fan of the Ben heck show i couldn't help but notice that his replicator has a top mount spooler set on it. I first checked to see if he had the files up but didn't seem to. (insert an Australian Steve Irwin accent) So I started my search out in the Thingiverse jungle. I looked high and low but alas i couldn't find any. So I designed one of my own.

right now the way I've built this it just sits on top of the printer; and my version is just a few millimeters longer than the one I've uploaded