Rigidbot e3d Underdog Mount v1 (reversible, single or dual, z-loss or zero-z-loss support)

UPDATE!

I have added 2 new stl files, underdog_pt2_backside.stl and underdog_pt4_backside.stl. These are respectively .2mm and .4mm taller, and can be used to offset one hot-end slightly lower in a dual extruder setup for bed leveling when normal techniques fail to get it just right. You can use the regular front/smaller piece.

Here is my latest e3d mount for the Rigidbot. This mounts under the aluminum plate allowing you retain the stock extruder mounting block. The short bowden tube on t