Had a Hasler on my old
Columbia 33 that I did a Calif. to
Hawaii round trip on in the 70's. It came without a vane, and I built one to the original design, I used light
marine ply, some spruce for the arm, and a zinc disc. for a counter weight. I put the lightest
fiberglass cloth I could find on the ply. to protect it. Used polyester then, would use
epoxy now. It was fool proof, held up in very tough conditions (40-50 kts) on the return
passage. It was a great
self steering unit. I'd stick with the original style vane, and not worry about light or heavy
weather mods.