Black widow spool mount

This is a spool mount for the Black Widow 3d printer. I liked quadberts design for the Prusa I3 but obviously that wouldn't fit the Black widow. So I made a similar design. In fact it does still use quadberts quick change insert since I saw no reason to alter it. I've also included a spool holder that I like to use with it.

There are two arm types included. the first is a simple arm brace. The second has been slightly optimized for faster printing and less material use (about 15% improvement).