It seems that most people believe that adding fin length will drive the tip of the ski in the water. Some ski manufacturers further claim that this is more noticeable on your offside turn. I'm wondering why this happens. Is it due to an increase in drag that creates a rotational moment which rotates the tip of the ski into the water or are there some other forces at work here? If it is simply drag, why is the tip pressure more prevalent on your off side turn as some ski manufacturers suggest?