I have to say that I have a lot of fun with just 4 channels. Soon I willl need 5 for the retracts on my Mustang. I might use 6 just so I don't have to use a "Y" on the ailerons. I don't think I will ever have an airplane with 4 servos on the wings and I know I will never own one with 2 elevator servos.

Thanks for the tip on the 9c from servo city though. That might just be the only way I'm going to be able to change channels and I sure didn't need that expensive reciever unit.