Hevo x-carriage for titan,v6 and piezo orion

28//2019: the fusion file for the cariage seesm to have a strange 360 bug that duplicated the model.new new_x_carriage_1.f3d is added

This is a compact design combining an e3d titan extruder, a piezo Orion sensor, an e3d v6 hotend, an optical endstop and a part cooling fan.
The photo shows the first version that had a different part cooling fan duct. This simpler duct works better. Als the end stop didn't fit (I glued it).I tried to fix this, but haven't printed it out.
I added the parts I