Just in case any body is wondering I pulled the trigger and did it, I haven’t taken in crawling but did try it in the front yard the cogging is very very minimal and I could probably live with it but I think I’m going look into a sensored system new or used I am very happy with the way it runs on 3s. It’s doing at least 25 to 28mph now and that all I really wanted . It’s running stock 68t spur and a 18t pinion I may drop it to a 16t but the motor was running warm at best then again it was only about 88 degrees here yesterday