Stupid question

[Fireman700]

Okay stupid question - but its been a while since I've tinkered with FM transmitters.

I have 2 trucks running on 72MHz FM. One is High Band at 51 according to the Crystal and the Other is at 58. Both trucks are running the same Receiver different Crystal. If I buy another 51 or 58 crystal, can I just swap the crystal and use the same radio for multiple rigs? Or is there some binding process? If its just a simple crystal change I can then get another FM receiver and the same crystal and run all 3 off one radio.

I want to scale back on the number of radios I have - 4 trucks and 4 radios is a bit much. If I can do 4 trucks (3 off one radio and one off the other I'd be alot happier for travelling with the trucks). Thanks for answering my stupid question