I remember when I was a kid, I didn't realize that the only difference between 75mhz and 72mhz was the band allocation. I thought that 75mhz was unsuitable for RC planes, and 72mhz would fail on the ground. There were also a lot of superstitions about the antenna length- I was terrified to mess up the antennae on my receivers! LOL. I really do look forward to seeing what you do. You also might consider 900mhz or even 433mhz band stuff. The options are definitely open! Not sure if you have your ham radio license, but you know, some of the data protocols on HF would be pretty nifty to use for C+C backup