Chimera/Cyclops mount for 2 Nimbles

This adapter fits the following x-carriage.
http://www.thingiverse.com/thing:1991116
It allows you to mount a Chimera or Cyclops hot end and 2 separate Nimbles. This give you maximum flexibility.

The adapter also have mounting points for the following sensors:

* IR Sensor by David Crocker
* Proximity sensor 12mm diameter
* BLtouch sensor
* Square Proximity sensor

So all in all, this is one very flexible adapter.
Changed the model slightly in V1.1 and added a small groove to avo