Kossel 2020 filament holder with bearings

UPDATED 3-6-16: The Connection part has been modified to have wider rails that fit into the groove on the arm part. I have had issues with the arm falling out of the groove, so widening the rails by .4mm on each side should do the trick.
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A remix of http://www.thingiverse.com/thing:231725 to work with a Kossel 2020 delta printer.

Holder has a quick removal connection and contains 2 12x28x8mm bearings that you can get on ebay or Amazon for a couple bucks each