daspi, I made one a couple years ago, about 162 x 50, straight edges, no rocker. It works great in light winds, bends real nice, smooth and doesn't need fins, no splash. I used the same stuff for foot pads. The pic is an old which shows I used some old boom wrap but that wasn't cushy enough. I still use windsurf straps but think I'll upgrade to regular straps. I used a cheap can of marine paint, I coat it every spring.
It's really amazing that it can even work, still surprises me when I use it... defies logic.
I use it in light chop as well with no problems, goes right over waves.
DSC01344.JPG [ 147.38 KIB | Viewed 1494 times ]