Like art there are many different styles with fins, upright to leaned back , area to nearly none...and these all perform ,but not for everyone . Sometimes the amount of twist and flex, positioning and depth play a very important part with your boards performance...if you don't get it right a well shaped board can be a dog......If you want a custom made precisionally and professionally foiled fin ,contact me and I'll make to order and help you with placement on 0404892397.....I'll keep outlying this Fin section with a bit of history and hdrodynamics info, remember..... without a good rudder a ship is useless....