OpenBeam Kossel Pro mount for spool holders

If you have a few of these Replicator 2 spool holders lying around: http://www.thingiverse.com/thing:44906 and want to use them..

... you can print this mount and attach it onto one of the Kossel Pro's upright extrusions.

There is a little lip printed on the open side to keep the holder from easily sliding out, so to release, pull the holder up, and out.

_Updated 2015-01-21_: The spool holder now takes a bit of effort to insert/remove the first few times, but is now more secure overall.