RE: Transmitter
Sir Crash-a-lot - your easiest solution is just to buy a GWS on board mixer - about $10 and only a few grams - cheaper and better since you will be familiar with your 6-channel Tx and won't have to relearn the slide throttle technique. I speak from experience since, in my initial ignorance, my first Tx, [a Futaba SkySport 6YG] didn't have mixing!
Cheers, Phil