Anyone with the HPI's super nitro RS4?? I just ordered one from Tower and was wanting some input from anyone that has one. The main thing I was wondering was the motor. is that .15fe strong enough to get a bigger car like that to good acc. and top end?? I'm thinking that a change of engines will be my first go at it. I'll probably go with the TRX 2.5. I allready have a 2 nitro's with this engine and it beats all my others by far...