I also fly using both the spectrum DX7 as well as the JR X9303. Both are excellent transmitters and they both can use the Spectrum line of receivers. I personally have 2 Jr 9 channel, 4 AR700's, 3 AR 6200's and 5 of the newer (and cheaper if you only need 5 or less channels) AR500's. The 500's ARE a full range receiver even though they only have the single module with one short antennae and one long antennae. The long one is a coaxial antennae that basically serves as the other (second) receiver. It must be extended and the last couple of inches placed 90 degrees to the short one. I have been using this receiver since it came out and have had absolutely no problems with it. I am known to fly a long ways away and it behaves just like its multi-receiver brothers. It does have 2 aileron channels for easy hookup and looks like it might be a 6 channel but it isn't. All receivers are shock sensitive and should be treated as such. As far as I know, the only thing that stops or blocks the 2.4's signal is metal objects (engines, ect) and that is one of the reasons for the satelite receiver with these 2 brands. The beauty of these short antennaes is that you don't see it. The foam covering will not interfere with its signal catching ability. Enjoy