Frictionless Spool Holder

I've seen a number of spool holders on Thingiverse, but none fully met my need so I designed my own. This is a "frictionless" spool holder that uses ball bearings and fits over a 1" wood dowel. I use this to hold my flexible filament to minimize the amount of friction feeding into my Raise3D N2 printer.

Made to fit the majority of spools. I've tested with MakerBot, NinjaFlex, Hatchbox, and Matterhackers.

The bearings are a little excessive and larger than what you'd need, but it works well