I built a SUP two years ago. It was hollow wood construction, like an airplane wing. It was an amazing project, but after paddling this SUP for a year, I knew that the design could be improved. I created the new design in CAD (computer aided design) and realized that I could do much more than just make the design better; I could also cut down on my waste. By changing the design into the right configuration and using the SHOPBOT, a really sophisticated mill, I cut the entire SUP out of one sheet of plywood! Not bad!!