Although there may be such people around here somewhere, I'm not aware of anyone who regularly flies their Jetcats with a two-channel setup.

I'd recommend hte single-channel setup unless you have a very strong reason to do otherwise.

Are you going to have anyone help you (in person) with the test flight, and maybe some buddy-box time ?

Especially for your first turbine, you should try to set it up in the same way as whoever is going to be helping you fly it. Last thing you need IMO, is to use a setup that may cause problems due to it being different from what your likely instructor(s) use. That extends beyond just the turbine controls - some people set their rates 'backwards' etc - try to avoid doing stuff like that because I think you'd be mightily P.O'd if you lost or damaged your jet due to something that's so simple to avoid.

Last but not least - welcome to the jet scene Ciprian !

Gordon