Having been unhappy with the original 850 motor I put in a Graupner 700 9.6v. it now performs better on a smaller prop and less voltage and I'm delighted with it. Steering is still a bit vague but good enough- very manoeuverable. Also installed a Modelboatbits rubber coupling which has made a noticeable difference in quietness and reduced current draw. Measured current draw stationary on 14.4v- 25amps. (Motor: Graupner 700 9.6v) (ESC: Electronize 30 amp) (10/10)