Hi BretA,
Welcome and I also wanted to say thanks for your documentation of your experiences with your GPR-S, that I probably read on the elmoto site. I also have purchased a 72 volt GPR-S, and am currently waiting for Electric Motorsport to put it together and test it. It is not quite stock, because the batteries are 60 ah. I have been dying to ask you -- once you got all the bugs ironed out with your machine, have you been happy with it?