Making such edits puts you beyond the scope of the beginner and even intermediate user. You may therefore prefer the interface version. For most the Interlink still remains the best option.... and with that you DO have the ability to connect your own radio if you choose, so you get the best of both worlds.

I like Aerofly 7 a lot ( superb and beautiful but very very few, 3D airfields! ), but the editor is one area where it is greatly lacking. You can not do simple things like differential mixing in Aerofly.

Channel assignments in a model are "hard wired" so to speak and most of the models only accept input from one channel for BOTH ailerons.... etc.

The just released version of Phoenix 5 greatly improves that sim's editor. It is getting to be more like Realflight's editor but it is not quite there yet.

Phoenix is lacking in the 3D airfields department. Their "infinity scope" doesn't cut it IMHO...

However if you want to use your own mixes particularly with helis, Phoenix does a GREAT job.

I've been able to take my real Trex-600's CCPM setup and use it with the same heli in Phoenix. After a few minor adjustments to the sim's model I had the same response in the sim as with my heli. I then used this to set up a bunch of new "modes" on my JR 11X radio and experiment with different head speeds, pitch angles, etc.

When satisfied I flew my real heli with the same setup with identical results... that was pretty neat. The one model memory in the TX worked for both the modified sim T-REX and my real one.

Realflight lets you do the same for planes and sailplanes, but it does not handle the CCPM inputs and multiple swash input modeling for helis yet. It treats all helis as 90 degree standard swashes vis-à-vis swash channel inputs from your TX, no matter the heli.