Heffe MP3DP2 Parts

Hi, these are the parts I used to make this printer my own.

Some non-standard things I've added:

- E3D v6 extruder. Cuts down on total Z travel, but I wanted the 3:1 reduction and didn't want to spend the money on the titan aero.
- BLTouch. I am a fan of auto level and this sensor is the best.
- TMC2130 drivers, and sensorless homing
- PTFE for filament feeding

These parts are partly to accomodate that, but I think also to make the X mount a little beefier. The 8mm rod clamps, fo