Flatlander, I've found the wings slow the boat as well. Was going to leave them on to give the wife a better anchor point to hold the chute. Seems I would get some time on 18s' with them on because of the weight. Wouldn't I be racing a 18 sx basically. Larger spin and main on mine, wings were standard on the SX. I don't know how to calculate for carbon daggers, they are one of a kind made by a friend. Appreciate all info from you guys, Thanks