Congo Introduces its 5 ft Soft-top ” The Fin ” and its 6 and 7 foot Soft-tops ” The Whale”. We start with an M-core Center and laminate it between 2- 3/4 inch pieces of plywood that encompasses the stringer. The 2 pieces of M-core are straddled on each side of the stringer. The Stringers bow makes the contour of the board when it is ripped out of the plywood. (see pics) The M-core is then shaved down and molded into shape. Each board is hand made one by one in Oceanside California. Boards come standard with a twin fin but one can opt for an FCS Twin and Quad variations.