I learned that one the hard way too. I still use the 9C with most of my planes, but now the first thing I do is turn on the trans and see what it says before I turn on the rec. I do it before every flight anymore. I didn't loose one, but almost started the heli with the G-202 programmed in and that would have been a real mess. You have to look at it before every flight to get into the habbit. I used to have 7 radios and just got sick of keeping track of what is charged, what is cycled and what is not. This works nice. I am down to just 3 radios.