This mount plate is designed for most commonly used 12mm diameter hot end groove mounts. It works with J-Heads, Makergear hot ends and other designs with the same mounting option. It have been modified to raise 6mm up extruder, and allow a greg modified wade extruder reloaded to be mounted with big gear above belt clip. It is machinable or prinable (ABS only!!!) Derived from http://www.thingiverse.com/thing:55024, and redrawn with sketchup (sources provided).