Dx3c
I have done the Fly Sky thing and gone back to Spektrum . Just sayin , you should keep your Spektrum receivers and just pick up a used dx2.0, dx3.0, or I use a dx3c now that's great . 130$ new and ones 20 model memory. The 2.0 does 2 models and the 3.0 does 4 . They are really easy to get used for cheap . I just got a 3.0 for my son for 30$ on here ... Just sayin. We have had some FlySky radios interfere with spektrums at the track too.