this outline has come from traditional shapes with my twist on them, they have been tested and work so good. all 3 components (cork, paulownia and EPS) float where fibreglass doesn't float. this makes the board more buoyant for those early entries and small conditions.
full rolled bottom by default, how ever if you want a nose concave that is fine! I prefer cork deck for that little bit of comfort whilst walking up and down the board.