Rollin on 20s Filament Roller

*** Hey, if you like this one, fine. But take a look at Version 2.0 over chya... http://www.thingiverse.com/thing:1687448

I liked the holder I remixed but for a couple of things... it required extra hardware (beyond the bearings) and they were multi-piece.

So I modified the bearing axles to have a mushroomed head and a split down the middle so that a bearing could be popped on and retained without additional hardware to hold them in place.

I also modified the frame mount for the 20mm a