Anet A8 Spool Holder Combo

**Update:** (15 Jul 18) I'd strongly recommend using my parametric spool instead of the threaded spool:

https://www.thingiverse.com/thing:2855566

I've printed three of these in different sizes, and they all work as they should. They'll use less filament than this design, they'll print faster, and they dispense with the threads by just using two equal-sized half-spools that go together on a rod.

I'm still using the printer-mounted bracket in this project; I've seen no reason to replace