One can't have too many surfboards, that's for sure.I had a quad once (or maybe just used a friend's for a while) and it was fun. It rode differently.I finally settled on a shape that, to me, is the greatest shape ever: The Rusty Piranha. Even though it's a computerized mass production shape, it's still American made, Polyurethane foam, and the standard glass job.I ride it with a three-inch trailing fin, and large side fins. It's a trifin, but has the qualities of a quad. Wide tail, triple-wing swallowtail. It paddles like a longerboard and rides like a shorter board.Best shape ever.