Hopefully the larger motor doesn't use a larger shaft, although I can remachine the slot. It would give me a chance to remove that area I mentioned before, and give it a conture.
I am bouncing back and forth thinking of this. I figure I can use the lower grade batteries and 4P. I sae your setup and an 800W and a 1000W. The 500 you have pushes me around pretty well. I was impressed.
Jeff