Somehow the twenty appearance points loom large. One recent year at Muncie, if I remember correctly, one or two appearance points separated 1 from 2. Sparky is probably accurate, shine matters, unless you're doing a scale homage. Since there is no reward for designing your own, originality of aerodynamic concept or decoration is a neutral, might as well build someone else's idea. Many do this. Join the herd. Herd mentality. Safe way to go. Have we lost something?