I understand JP retract motors are limited to 2S voltage or they will smoke. My jet has a Jeti CB400 installed powered by 2 x 3S LiPo batteries. The output is regulated to 8v for the servos and JP gear controller. The brake power is 3S LiPo direct to the brake controller. This is how I powered the AG63 before the brake output failed and the JP brake controller before it fried. The best performance by far was with the AG-63 but the brake side failed. I have another one available so I may install it and see how it goes from there.