Hello Grand Poohbah.
The uneven deck of the spoon is actually glued on right side up. First the bottom is laminated (three layers) upside down, and then the board is turned right side up. The three layers of the bottom are now curved, effectively making the board a female mold, upon which the upper deck is built. It could also be done with a female mold as you described.
The double stepped longboard notion is certainly a mouthful, especially if you have your tongue in your cheek! Thinning one of my boards does not alter the weight very much. If I want to lighten the board I am better off thinning the deck planks, rail blocking, and frames. I am not sure why lightening the nose would allow me to lower the nose kick, in fact I am able to lower the nose kick anyway, as I do on the Dragonboards. The board at the top of this thread (the X-15) has a pronounced nose kick, and it is incredibly fast. The nose hardly ever touches the water except when hitting a foam ball or during a radical drop. It is the flat tail section which does all the surfing. The board is of course a tail rider. Also I should mention that the X-15 pictured at the top of this thread is only
One and five eighths of an inch thick, which is incredibly thin for a 14"9" board. It is not necessary to step the deck in order to achieve this thin section.
Regarding your question about how I came up with the parallel profile, It was during 1994, and I was standing on the verandah of number 2, Daisy street, Raglan, overlooking the harbour one evening, when the whole thing came to me in a flash of inspiration. . . . the flexibility, the profile, and the construction method. The whole concept arrived simultaneously! When we got back to our workshop on Great Barrier Island, I drew the first parallel profile on the concrete floor with chalk. I was like ‘no way!’ it looked so weird! It made sense though, (and still does) so we went ahead with it. The looks of a parallel profile board grow on you, especially when you start riding them. They look brilliant from some angles, and primitive from others.
The basic construction method was originally a multi directional four layer solid balsa lamination, we have gradually introduced hollow five layered and six layered framed constructon, but the original principle and design system is still the same.
All the best, and thanks for enquiring! Roy