Dual E3D bowden coldend with 50mm fan cooling print and hotends

This thing is for mounting 2 E3D v6 hotends in place and cooling them and the print with a single 50mm fan.

I updated my earlier design to raise the hotends in relation to the x-carriage to increase the overall Z-height.

I have also included a version which has no fan, if you want to use the E3D fans and don't want to cool the print, and a version which can hold an inductive sensor as an accurate Z-endswitch .