I think you have the basic grasp of what expo is. It can also be used to "increase" sensitivity when the sticks are moved a small amount but I personally do not know anyone who uses it for that.

There is no ideal setup. What I like you may hate. Pick a percentage, maybe 50%, and give it a try. Then try 25%, then 75%. Eventually you'll find percentages that work for you.

I'm currently flying a Sig Astro Hog and a Tower Uproar 60. I think I have around 40% on ailerons, zero on elevator, and 75% on rudder. My brother flies both planes with zero on all controls. It really is a matter of personal preference.

Carrell