When people are talking about caps for the receiver, they have electric cars. Does this still apply to nitro? I raced a car a few months ago that had Savox servos in them, and I simply installed my Spektrum DX3S radio and receiver, and I didn't have any problems. So I bought the 56 and 58, but don't want to have this problem with my DX3R now. Should I be fine, or still install the cap?