I own an 8’ Hap Jacobs 211 which has turned out to be an awesome board. I guess the model is Hap’s entry into mid-length performance boards. I guess the tail design is what is called a “winged tail”. The tail cuts in at about 14 inches from the end of the tail. What is the purpose of this design? I know Harbour has this in his Wingpin longboard. Thanks, Al