Quick release Anti Filament Unravel/tangle

A compliment of an awesome spool holder for flashforge dreamer,

http://www.thingiverse.com/thing:948937

Which I used M8 threaded rod + 20mm pvc pipe + end cap drilled a hole in the middle for my spool bar,

I designed this quick release anti-tangle cum feeder for it

20mm pvc pipe was always my favorite materiel for spool holder, the feed/anti-tangle is a add-on so I don't have to worry about my filament un-spooling while retraction or long travel that my printer does.