About this 3D model

Based off of thing http://www.thingiverse.com/thing:26535 which has the 8mm holes enlarged to 5/16" for us in North America. I added a simple bushing on one side so that you do not need washers to allow the bearing to free wheel. Required hardware: (4) 608ZZ ball bearings (8mm x 22mm x 7mm) (16) 5/16 Nuts (4) 5/16" Threade rod 6" long I am working on a combo filament guide/cleaner for this design, will update this with a link when I am done.