Rust and galvanic corrosion resistant reinforced thermo-molded Polymer Smart Tabs SX automatic flaps. They automatically set and keep the level / stabilize the boat thanks to the progressive actuators' spring. Do not require to be set and do not require control box or operator adjustment. Fast and easy installation without through holes. Save money by saving fuel. Increase thrust and top speed. Plane in half the time. Reduce bow lift angle. Reduce porpoising.