Could somebody confirm that the stock radio system is AM and 27mhz. I want to use my EX-1 UR, but don't quite have to money for 2.4ghz module/receiver yet. If the stock radio system in the RTR is AM and 27mhz, I can use my AM 27mhz mini-z module and a matching set of crystals right? Thanks, and sorry for so many questions, new at this.