Lenco 12" x 9" Edgemount Kit w/Standard Tactile Switch Kit 12VEdge Mount Mounts the actuator at the trailing edge of the plane, requiring 4" less transom height than standard mount Trim tabs make the single most important difference in the way your boat rides and performs. They are optional on some boats but should be as standard as power trim and tilt. Lenco trim tabs make your boat ride smoother, drier, faster and with increased safety whether on a small skiff or a mega yacht. Lenco's ballscrew design is more