sir squishy the reason you will outgrow the 7c is the mixing and linking functions on the radio. Futaba strips some of these functions from the lower end radios. Why I do not know becaus eit is just a matter of software. See my earlier posts as too why these functions are beneficial and on some aircraft mandatory even though in essence all you are running is the engine rudder aielerons and elevator. on the 7 you can slave one servo to the other for running a split elevator but the trim will only adjust the master side leaving the slave side out of trim unless you can link it with a 9c transmitter