608 Bearing spool holder

I have slightly modified the great design of the Bearing spool holder from chylld www.thingiverse.com/thing:7001.

I fits reels from www.watterott.com and www.reprapsource.com which seems to come from orbi-tech.de.

The bearing holders are designed to fit a 608 bearing and they are placed into the spool centre holes, with lips to stop them from going all the way through.