Spool / Filiment holder Spacer

This is a spacer for use between spools to ensure smooth running. I initially designed it for use between two of http://www.thingiverse.com/thing:62710 but then created versions for use with different spools to ensure free running.

Ther spool from /thing:62710 should have the LFS_Hub_External_30mm_V3.0.stl hub to match up with this thing.
spool_spacer.stl is the one to use to separate two of thing:62710

I use this with multiple copies of http://www.thingiverse.com/thing:62710 made with