I modified the file a little. (centered stuff up, used the symmetrical extruder mounting holes instead of the offset ones, added a nema 17 stepper mount, cleaned up the DXF, etc.)I love this new extruder! It works pretty well... :DI order to get the stepper motor to mount right, you may need to modify your 'weird dino' to get it in there... Or just make an spacer for the stepper. I personally am just using the geared motor that comes with the mk4 extruder.