THe JR 12X is available in a 2.4g dedicated or a module based system. The problem is the module system IS NOT compatible with any older modules, but a 12X specific module.
The logic behind it is that for US market it is on 72MHZ synth, so it has model match prior to transmision just as the 7202 built in synthesized TX.

I was told they would not make any HAM modules for it, If the european market of 12X will support your 35mhz then you may be OK but it most likely will be synthesized with model match.

Once I learned this I just stuck with the 9303 module type and added on a Spektrum 2.4g module, and a Robbe FASST 2.4 module, then I can still use older JR modules on 72mhz and 53mhz.