nema 17 2020 mount Z motors

ok so here is yet another Z motor mount. I designed this one to place the motor a little lower in the frame and to keep all amount of extra printing inside the bed movement area as little as possible, and seeing as how I like everything lined up perfect I added the alignment bumps. No supports will be needed for this print.

Update 10/30/17: received a comment that the upper 202 rail alignment bump was to wide and it and the hole for the bolt where to close to the lower alignment and bolt se