Perimeter stringer, 5# polyurethane rails, 1/8" basswood stringers and 1.5# EPS core.
The rocker, deck, and outline rough cut.
The rocker, deck, and outline rough cut.

If you ask for a crappy board, you'll get one.

If you ask for a crappy board, you'll get one.
Someone with say a SS that was running a fin with significant cant, and that wanted more drive, could reduce the angle of the cant and gain more drive.
, is prevent any loss of energy side to side and transfer that to forward motion. The deeper the fin, the less energy is lost to sideways motion. The offset to that is it's tougher to cause the fins to fail. Many of the tricks that we do require the fins to fail. The lip slide is the perfect example, when you ride up and throw the tail out sideways, that trick involves the fins failing to do their job.
The words he used to describe it were quite colorful. 
One of the things that alternative materials causes is changes in design. This new board, being so light, shifted the center of balance of the board reward due to the realtively heavy fin pod, in relation to the light board. Also, James was saying that the nose knifed into the wake too much. The heavier rail material did sink easier, but the nose went into the wave face too much.
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