XL glue stick holder

This was designed to work the the Qidi Tech 3D printer, but should also work on the Flash Forge Creative Pro and other clones of the Makerbot Replicator 2.

Reversible! So it can go on either side of the corner of your choice. That's 18 different locations.

Redesigned to hold 2 XL Elmer's glue sticks instead. If you're looking to use the smaller glue sticks, check out [this one](http://www.thingiverse.com/thing:1557386) instead.

UPDATE 6/23/2016: Extended the back section so that it can