Filament Spool Guide for 608ZZ Bearing

Simple guide for filament spools. Press the 608ZZ bearing inside.

I using this with the Adjustable size filament spool holder by pwnas:
http://www.thingiverse.com/thing:118330

I found that sometimes the spool would walk to the edge of the bearing and rub on the edge of the feet causing enough drag to mess up the filament extrusion. The M3D feed mechanism isn't all that strong. These guides move with the bearing, preventing this drag on the spool.