Ultimate 50mm Rotating Spool Holder - MakerBot Replicator 2

Quickly change 50mm filament spools using this amazing free spinning spool holder. The holder rotates freely to reduce friction and ensure smooth prints. Convenient slots enable you to quickly secure the spool using a filament clip. As a bonus, you don't lose filament clips. Both 1.75mm and 3.0mm filament clips are part of this project.

Video of the spool holder in operation:

http://www.youtube.com/watch?v=Ee25BwZchII
http://www.youtube.com/watch?v=j-4nSkeWlNw

This spool holder requir