The Flying Fish Twin is one of my all time favourites. It is my go to board here on the Sunsine Coast. It is about 1/2" wider at the wide point and in the tail and nose 12" than the reguler Flying Fish with the 3 - 4 set up. The rails are a bit lower overall and the tail is heavily rolled down to razor sharp edge. The result is a very fast and loose board with a surprising amount of drive for a twin fin. I use the smaller 5 1/2" STF's from Shapers Australia and the bigger 5 3/4" ones for the bigger guys. The flyer is about 1" further back and the fins are set well aft in the board. No need for a small stabiliser - this is a pure Twin Fin with plenty of drive.