One word of caution. You can use too much expo which puts you in a position where the control response is very agressive at the ends of the stick deflection.

If you use this on your Elevator channel on an a/c that needs significant Elevator deflection to hold low speeds on approach you could increase the pitch sensitivity rather than decreasing it.

Looking at the attached diagram you can see that as your stick deflection increases not only is the control response curve steeper than the linear response but it is assymetric around your new "neutral" point. i.e. You will get more elevator change when you increase the stick deflection than you will when you decrease it. This could lead to some potentially negative handling changes as you are trying to make the model easier to fly.

If you are testing changes like this you may like to do them on only one rate at a time. If the response on the changed rate (i.e. high) is adverse and makes things worse then at least you can switch back to low rate and land the plane in a condition you are familiar with to retune and try again. If you change the expo on both rates and the response is adverse you have a tough landing ahead of you.

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