RE: JR DSX11/Zero difference.
Rob
The difference is that DSMX now selects 24 channels and hops between them rather than just the two is as much as I know.
Reading all of the bumth on it however it was only really designed for instances where there were hundreds of radios powered up at the same time such as Joe Nall.
You could get it from Horizon but it would not be legal to use in the EU......
Steve