Revised Filament Spool Sprocket (Quick Change)

Update: This removes the sharp edges from my original quick change spool holder.

https://www.thingiverse.com/thing:2067525

This spool sprocket is intended to make removing a spool of filament super easy; as easy as changing tires in NASCAR competitions, (well almost). No really, it makes removing nuts a thing of the past. It works with standard 608ZZ bearings or without, your choice. See my spool holder top mount as this is a perfect complement to that thingi but it works just as well