SK,

The SS as I know it, the Transmitter links up using independant freq for each receiver upon initial power up and then jumps freq across entire 2.4 GHZ range in tandem with the receivers, thus with the skipping rate and dual redundency many systems can use the entire bandwidth at one time. I've been to indoor events in which as many as 30 users were using that above radio system.

Some other items I am understanding is, it's the same principal as home cordless phones used to isolate each other among neighbors. Also in the USA since it is using the 2.4ghz band comes under differant FCC classification/regulations than the 50.75,72MHZ rules and so our AMA allows for working within the FCC rules which is why people are tinkering with the RF section into other radio types.

Also it is said that the other radio manufactures are chomping at the bit for this technology to market and have systems ready to go however this dual receiver redundancy concept in radio control applications is what Horizon/JR are said to hold an exclusive patent on. The others are working on work arounds.

AND the best part is if you own a current JR radio that uses plug in module RF sections even dating back to the late 80's that JR has a plug in SS RF module that has the antenna as part of the module and can just be plugged into any JR system of this type RF modules.
That way using my same JR 10X I can opreate on 50/53, 72/75, or the latest Spread Spectrum with just a module changeout.