Compact Direct Extruder Mk7 for 1,75

This is my rework from http://www.thingiverse.com/thing:158074, designed to fit with my E3d Bowden mount http://www.thingiverse.com/thing:246726 to be able to use it as a direct system, in order to have more choices.
You will need to remove some cell-shaped zones I put there to print without support, and maybe force the little fissure found on the top to allow the upper part to let it deform evenly as it pushes the bearing arm against the Mk7.
One 608 bearing, about 3cm of PTFE tubing and s