ORIGINAL: Bax

The anti-servo tab on the Piper stabilators is not to "de-power" the stabilator, but to provide control feel for the pilot, and give the stabilator a tendency to move to the trimmed position. When the pilot moves the controls, the anti-servo tab provides the resistance the pilot needs. A larger anti-servo tab would give the airplane a heavier control feel. Balancing the size of the tab, the amount of deflection is makes with respect to the amount of deflection of the stabilator is what gives you the control feel you need to safely and effectively control the aircraft.