I am trying to understand why people put 3 fins on longboards. Are'nt they made for short boards and "turning" a lot ? Don't they cause drag ? Longboards are'nt made so much for this style of surfing. I know that sometimes thed don't toe in the longboard side bites . Are they for more hold on steeper waves ? Could'nt you get the same result from using a longer single fin? Thanks..........Aloha..