You can view the React
here. Yes, the Nomadio is compatible with Spektrum recievers, but requires to be programmed by a computer to do so, so switching from Nomadio recievers to Spektrum recievers requires a computer. DSM (Nomadio calls it "Da Slow Mode" for legallity) is obviously gonna be slower, but the Spektrum receivers are gonna be smaller...I think the Nomadio receivers are the way to go despite the fact that there
slightly larger. They allow the use of the sensors for the telemetry, so I wouldn't complain...They are about $100 a piece though (with sensors)....By the way, not sure, but I'm pretty sure the antennas are about the same length of the Spektrums, if not shorter probably...