Sherpa Extra Heavy Modified Rear Housing

Multiple people (including me) stated that they needed more clearance for the shaft bearing, or that they had added washers as spacers to get it to fit. This fixes that issue.

I also removed the need for supports. Without my modification, part of the model needed supports, or was printed in thin air (which kinda worked when I tried it).

Added extra clearance for shaft bearing as well as eliminating the need for supports.