Hi,

What I found is the left side motor seems has large resistance as it had a moving trend when tank is turning right. Also, I heard some noise from two motors when they are working. I did notice this nosie when I was using Rx-18 but even 2.4GHz the noise still exits. The temperatures on both motor are same from my thermalmeter. I thought the left side might has higher resistance or the driving voltage might be lower than right side.