I sail an IMCO. Sail it like a shortboard, reaching.Been tinkering with fins. Standard 34cm. Put 39cm finworks pointer in. Board seems to ride higher at tail with mastrack in my normal setting. So at just planing speed the board feels stickier, but once up n planing its more stable n feels faster. Should i move the mastrack further back to reduce downforce/ wetted surface area. Letting board breathe n get planing easier?