The Classic, Stylemaster, and Retro all slow down the pace, glide down the line and turn like a Mercedes. I learned to shape professionally in the 60 s, at Gordie Surfboards. Gordie was a meticulous craftsman and master of the egg rail. I have maintained the graceful outlines and rails of the 60 s, but stepped up performance slightly through improvements in V and rocker. These classic models feel light and responsive, but smooth and predictable.
Rocker is the most important aspect of performance.
It determines where the sweet spot is, what size waves the board will work best in, how fast the board will be, and how heavy a surfer it will work best for. The bigger and faster the wave, the less rocker you should have in order to insure that a boards maximum speed would be adequate. For the 160 - 180 pound surfer, I have found that a 9 board works best with these tail rockers. Really big guys need less rocker to keep their boards from tracking too deep in the water. All Clark Foam blanks I use are glued to private Infinity rockers.