About this 3D model

[edit] Please see the remix for a more finalized version. [edit] The v2c STL file is the one to print. The small top piece fits much better than v2b. I liked noreway's design, but the idea of using an extruder to print small plastic cylinders out of reels of small plastic cylinder struck me as kind of funny. So I tightened up some tolerances to fit 2mm filament, loosened others so I could print on my makerbot x2 without cleanup. I've also included a pegboard thing to help make perfect 3mm-long cylinders. The result works. I won't claim it's perfect, but I'm getting better results than gear bearings with mine.