So Ive got an associated b4.1 and I want to upgrade the remote. Ive notice that throttle lags as well as the steering. I was looking at the Spectrum Dx2s or the Dx3s. Since im still considered a newbie.. is having the extra channel a big deal? I wouldnt be using the remote for anything other than the car. I might even put another receiver into another car I have and have 1 remote for 2 cars. So.. Would 3 channels be completely necessary?