I use to change the mode of some radios some time ago, it was really easy just changing the spring and a metal ratchet, but that was before the computerized radios, I believe that it could be done the same way but you have to be aware that when you are into a programming level, elevator and throttle will be different channels. I would send it to Horizon or ask them firstly for a quote, and then you will know if your buddy did or not a good deal.