You "Lift" - Plane on the wide surface of the base of the fin , jus like the surface of the board , you control that "Lift" - planing by reducing area above or behind what you are planing onPerhaps the lift theory is wrong , since cavitation is a dominant player do we confuse the issue .? Does a perfect fin foil create the cavitation that gives a lift feel ?
Mind Blowing Stuffs right there ;-)