Da Vinci Pro Spool Holder with Bearings low tension

I designed this to put as little resistance on the filament as possible, while also allowing quick changing of filaments. I also made it as universal as possible for all spool types and sizes. I use hatchbox primarily. The use standard 608 skateboard bearings. I recommend redz bearings. The nut and bolt is a standard size, i got it from Ace hardware. This is the best spool holder i have used, with almost no resistance on the filament as it feeds into the printer.