Spool Holder (RigidBot)

Spool holder for RigidBot, uses a dozen [5/16" ball bearings*](https://www.amazon.com/Slingshot-Piece-Inch-Steel-Ammunition/dp/B00YSVRZB4/ref=as_li_ss_tl?ie=UTF8&qid=1449986461&sr=8-9&keywords=slingshot+ammo&linkCode=sl1&tag=whirligh03-20&linkId=45dfad50431d3e53c1708308042b4871) (or slingshot ammo). Attach the lower screw before attaching the spool holder.

Make sure you test the strength of your print before using it. You'll want it to be strong enough that a tangled spool won't get pul