And your friend didn't get waves from the wind, he got waves b/c he bought a hand-laid wet layup hood. If your hood weighs more than ~25lbs, pins are probably optional. If you had a dry carbon hood coming in around 12lbs, you def need pins. Most hoods just have the latch held onto the rest of the hood with a bunch of fiberglass, which is kinda like trying to glue a sail onto a boat: it ain't gonna hold when the wind blows hard enough. If you have a hood with just one layer of cf over fiberglass, its probably going to be heavy enough to offset the pressure difference that tries to lift the hood off. But you can see it fighting if you watch at high speeds, so play at your own risk without a net.