It's been my experience that once you get past about 50-60 degrees of throw then there's nothing extra to be gained.

Air doesn't like going around sharp bends and once you exceed a critical angle, the flow over the control surface will stagnate near the hinge-line, producing a much lower "effective angle of deflection" anyway.

Also don't forget that as you adjust the linkage geometry to get more throw, you're reducing the amount of force you're able deliver to the control surface. In a maneuver such as a blender you may find that you get *less* effect because the servo's maximum torque limit is exceeded and you get blow-back.

Also remember that as you go to larger and larger throws, the *precision* of your servo movement will reduce because each "step" of resolution will be a larger deflection of the surface.

I recently set up a 50cc gasser with a *lot* of control throw and found that the limited resolution of the HS5955TG servos (even with the lowest dead-band setting) meant it was difficult to fly straight and level. I reduced the elevator throws and all is now well.