Bruce, I agree. I as one, did not know this. I thought you just had to send it in, for them to tune it, so you wouldn't loose range or have any issues with the electronics, I did not know it was illegal, honestly and a lot of people do not. I think the TX crystals should not be sold then, and if you want to change the channel, then you have to send it in, and they install the crystal, not buy it from Tower and then the owner sends it in, too easy to just use the radio, etc. Maybe just some better warnings about changing the TX channel with our radios and accessories.