One of the class rules states the max lenght of fins cannot exceed 500mm.
This rule was established in 2010/11 to pretend development of crazy & expensive fins as it had happened in Formula Windsurfing (a 70cm g10 blade worth tons of $$$)
500mm = 19.68"
At that length, the Maximum amount the materials for a carbon and Nomex-honeycomb fin,
couldn't exceed $200 for the home-builder. The Mold itself could be done for Under
the same amount, but then Ya get 50 to 75 parts before the mold starts to loose resolution.
That is NOT a Lot of money !! So ,"Why the rule" ??
And if that's really the reason for the rule, then there should be an Open-Class to
promote More and better technology ; otherwise there just promoting stagnation
for the sport.