RE: Freq Change?
Here's what they are going to tell you.
Please also note that 50MHz, commonly known as "HAM BAND" or "6 meters" is legal for both air and ground use. If you have a HAM users license you can safely and legally utilize 50MHz frequency radios for both aircraft and ground models without requiring any changes. Only 72/75 MHZ MODULAR transmitters (ie. 8U, 9C, 9Z, NOT 4VF, 6X, etc) equipment can be converted to 50MHz and vice versa. Receivers and crystal-based (non-modular) transmitters CANNOT be changed.