Figure 7.  Q template quad fins. This fin set was designed and foiled specifically for the Sans project by Rich Sanders of Halcyon Custom Fins. Mr. Sanders is a brilliant designer and craftsman who provided advice and input at all stages of the creation of Sans. He then fine tuned this particular fin set to accommodate the board. The lead fins are 4.75 inches deep. Trailers are 4 inches deep. The fins feature an 80/20 foil and are undercambered on the inside surface. The fins were foiled from an E glass/polyester resin panel.  Bling.