I usally start out with 125% on my 9C, fly and see whats the maximum I'll need on all surfaces and then back off on my throws mechanically for maximum torque. Then I will up those endpoints for best resolution, this works out great with fast servos because I am losing some speed with higher endpoint settings. Some models never really need that high 50-60 degrees of elevator throw to get them to perform really good extreme 3D. I even had friends models I setup that would perform perfectly flat spins, true vertical elevators and zero elevation walls while only running 42 degrees of throw.