Figure 8. Aft to Fore Hull view. At a point approximately 18 inches forward of the tail, Gromzer’s hull transitions from flat to double concave. Concave maxes at 1/8” deep in the vicinity of the forward rail fins and gradually blends back to flat for the last 3 inches of tail section. Note also that the tail section lobe is crisp and sharp with no tuck for maximum release. This approach to tail the section lobe is consistent with modern short board methodology. Interestingly, Master Griffin would likely frown upon such an approach to tail section lobe design. With all due respect to Master Griffin, it is appropriate to consider, of course, that he shapes and designs boards on the North Shore of Oahu, where control features likely take precedence over speed generation and release features.  The chupas haven't made it to Oahu yet.