Filament Holder 608 Bearings

Another filament spool holder arms for a 6mm Prusa i3 MK2 gantry. The cradle can hold a 608 bearing. There is clearance for a 1/2" wide nut as I have to use a 5/16" threaded rod for the spool axle since M8 threaded rods are hard to find locally. I think there should be enough clearance for whatever diameter an M8 nut is.

I use this in conjunction with [Ultimate Spool Adapter (Imperial) ](http://www.thingiverse.com/thing:2128024)