RE: Linkage setup
You'll just have to go out and fly and experiment. Only you can determine what is most comfortable and what setup performs best for you.
I recently switched out my transmitter springs to very stiff springs. As a result, I have reduced the expo on my ailerons down to 22%. I think I may go down a bit more. I'll be experimenting with the elevator and rudder too. Fly, fly, fly, change expo, fly, fly, fly....
Dave