Depends on what you are comfortable with. I fly the explorer with maxed out throws and 30% expo. I train people on the explorer with 50% rates and 30% expo. As a default for sport planes I setup 3 rates, 50%, 75%, and 100% all with 30% expo. Then depending on the plane I will make changes, for example I may set a rate of 40% with 70% expo on a speed plane for those high speed passes 2" off the ground. It is good to have options mid flight.