Prusa Filament Spooler

Printer-mounted or desktop version, inspired by TUSH.
Current version works for spools up to 70mm in width (recently discovered I have one spool of filament at 90mm...ooops!)
Snap it together or glue it together, either way seems to work.
Use real 608 bearings (4) or the included printed version, but you will need 40 bb's.
The printer-mounted version perches very nicely atop my Prusa i3 Mk2.
The desktop version works flat or canted forward, whatever works for you. I like the aggressive forward stance.