Here is a question then. I am looking to buy a new radio as my futaba 6x is at about the capacity for which I can use it for. I have 3 FM recievers. I am looking at the 9Cap or 9Z and want to know if either will work with the FM recievers or is it time to sell them too and invest in all PCM. I understand that if I buy a PCM/FM transmitter I need to switch it to FM every time I am going to fly one of my FM recievers or does it program in with the other airplane functions. I guess if I need to buy all PCM then so be it but woiuld like to use my FM still. Any help and radio selection advice would help me in my purchase.......