No offence to DNF, but before anyone slams the model shop, let's remember that for something to be understood, someone has to be on 'transmit', and someone else has to be on 'receive'. If one or the other fails in their task, misunderstandings are easy. As Robert McClosky, a US State Department spokesman, was once alleged to have said...
"I know that you believe that you understood what you think I said, but I am not sure you realize that what you heard is not what I meant."
There is no evidence that using 27Mhz, 40Mhz and 2.4GHz in the same race produces any interference at all. This regularly happens at 12th meetings, and they're indoors which often makes the problem worse. Buy whatever you want, and if it has crystals, make sure you have three choices for National meetings to help the race organiser. HTH
