Geeetech Prusa I3 X Y Idler & Tensioner

Geeetech Prusa I3 X 8mm Acrylic Y Idler & Tensioner is a complete rethink after few mishaps with my first tensioner support bracket remix would catch the Y carriage occasionally.

This was inspired by reading about pulley systems for another project but then finding Crowned Pulley by DaleDunn http://www.thingiverse.com/thing:14117

Note: the pic of the crowned pulley was my test that was too tight and I used a heat gun to fit the bearings... the printed part should be a good snug fit and wou