On 4s, and with tall gearing, you may have startup issues. I would say to go to higher voltage and less gear, but that becomes difficult to do with the lack of a good line of car designed hv controllers (the ones that everyone does not think we need...)
I'll do my best. It looks like the motor is listed 3 times on the same username, so hopefully I can pick it up easily. I may try out a Kontronik controller for this.