Hmmmm.....
Still confused.... I fail to see how this allows you to set the center position flap throw. If you adjust point A to Flap up and point B to landing flap, switch center gives you a fixed amount of throw and therefore fixed amount of flap deflection that is not user defined....???.... In addition, by reducing the endpoint (ie: ATV) instead of setting you linkage geometry correctly for Full Up/Full Down deflection reduces the available torque and holding power of the servo?
Todd