Strat,

If you're using the 7CAP radio with the Axe's stock receiver, you have to be sure both are on the same frequency AND the 7CAP is set up for PPM not PCM. PPM is FM and should work with the AXE's stock receiver. Some here have found that the rx is mainly a high range rx meaning the frequencies are at the high end of the scale. ( like 36 up to 60) The lower numbers might not work with the rx. You can change crystals in the receiver without too many glitches, however, if you want to change the crystal in your Transmitter, you should get it tuned at a service center. Now, your Futaba 7 might use "modules" which you can switch out yourself without sending it out for service.

Reading back through this it sounds confusing. Hope it all makes sense for ya.