RE: JR DSX11/Zero difference.
Rob, Duncan
The Current JR DSM2 compatible radios will work with any DSM2 or DSMX rx so yes you can use Spektrum.
DMSS radios will only work with DMSS rx's but my understanding is that the DSX11 conversion will make the radio into a modular set so you will then be able to use whatever modual you like and therefore you will be able to swap as you need to.
Steve