This is my take on an extruder controller mount for the MK5. It mounts your extruder controller to the right of the plastruder arch support. Originally I had mounted the controller in this position using zip ties through the bottom holes in the board, but this was a quick and dirty way in order to get the bot running. The mount is secured using the existing unused hole in the Z-stage and requires no modifications to the plastruder mount.
STL and SolidWorks 2010 model files included.
Print and secure your extruder controller using two M3x15 bolts and two M3 nuts. Place an M5 nut in the captive hole in the mount. Secure the mount to the Z-stage using an M5x14 bolt.