Spool Mount Meddley V2 (Bearing version)

This is the second revision of the spool mount I am using for my Prusa Mendel. In this version, I am no longer using the top parts of http://thingiverse.com/thing:32320. I have designed my own top parts with bearings. This version still uses the bottom part of http://thingiverse.com/thing:30742 .