Jet Filament Endcap for 8mm Shaft

This is a printed endcap I made to lower the rolling resistance when my printer attempts to pull filament from a Jet brand (from Amazon) spool.

I printed two of these and put them at either end of the filament spool.

OpenSCAD file requires Partial Rotate Extrude:
http://www.thingiverse.com/thing:34027