Simple Aluminatus Spool Holder

This is a simple, easy to print spool holder for the Aluminatus printer. It makes use of 8mm or 5/16" bolts or threaded rod to hold any of the 608 skate-bearing based spool hubs such as this http://www.thingiverse.com/thing:105484. It also works with the Lulzbot filament spool http://www.thingiverse.com/thing:22759.