Spool Bushing

Here is a revised spool bushing based on my previous http://www.thingiverse.com/thing:753630. This version can be be customized in the customizer. Any parameter can be changed making this suitable for any spool on any rod that will fit.

The original Description below:

This is a spacer for http://www.thingiverse.com/thing:705345. Print 2 and put one in either side of the spool. It acts as a bushing and gains a little more clearance between the spool and printer. It also prevents the spool f