Printrbot Spool Holder

I'm a big fan of the Printrbot Metal Simple; we've been testing them a lot at the office in order to release their driver. Now if you have Windows 8.1, you have plug & play support for this printer (along with Makerbot and UP!). However, one thing it's missing is a place to put the spool. This simple holder presses onto the tops of the Z-rods and holds all the kinds of spools we've bought from Amazon and Makerbot.

My shameless plug for any of you using Windows 8.1: Download [3D Builder](http