Right... Just spoken with the powers that be!
The answer was not definitive, but.... The module is designed to operate the full 12 ch's and that depends how it interfaces with each radio. I have been told, that in Theory that this module will work with all the proportional channels of a particular radio. Example. if you have a TX that has 8 proportional channels and lets say 2 non proportional this module will only work with 8. But if you have 10 fully proportional channels then hey presto 10chs it is!
Hope this is of some help?
Regards Al