Spool Roller V3 for 608 bearings (up to 1kg spools)

YASR - yet another spool roller ^_^
This is designed to take spools from 50mm to 78mm wide spools. It's another take on my V2 roller but the spools are riding directly on the 608 bearings.

Edit:
I've redesigned the 40mm spacer to prevent tangling of the filament while printing.
You'll find my 12 bearing version here: https://www.thingiverse.com/thing:2848029

YOU'LL NEED
-M8 threaded rod
-8 to 10 608 bearings
-metal saw