Just FYI, when looking for a DC power cable for the RP2 and RP3, I'd recommend looking for 2.4 amps. I've powered on 1.0 amp and the GPS and second SDR dongle start to fade out. With a 2.1 amp, things are better but not completely, the GPS can take an extra long time to lock and hold. With 2.4amp or higher, the RP2 and RP3 seem to work smooth as butter. I'd recommend springing for a DC cord that supports 2.4+ amps.
Also, anyone trying to plug the Stratux into the USB of the iFly 700, 720 or 740, this will not work. The iFly USB port is a low power port and not designed as a power source.