I fly JR tansmitters with various receivers (JR, Futaba, Hitech, FMA) and servos (JR, Futaba, Hitech, Airtronics, Ace, FMA, GWS, Bluebird, Multiplex and other junk) and the only time I have an incompatability is with two different brands on a Y connector. A couple of the oddball servos didn't like playing together. On different channels and mixed, everything was OK.