I have installed a DX7 in my AXE CP, and had no issues doing so. In the AXE CP, the RX is separate from everything else. Just remove the RX and drop in the Spektrum RX. I would, however, reccomend having someone experienced with setting up a new radio in a heli help you out with the programming and initial trimming, as it will take a lot of it. Once set up, it will be a much more enjoyable experience.