Dang! I wish I'd read the last line before we went to the marina. They other folks sure gave us some funny looks when we sang but a few tapped their feet when I played the second verse on my harmonica!
Seriously though, I think you're right-I think it's the wrong pin but I've adapted it so it can't slide out. With a single pin in the middle it invariably will slide all the way one way or the other. I built it out on the inside of the mast so it can't slide but if I have to replace it, I have a buddy who runs a machine shop and I'll have him make me one to fit.
Appreciate the replies and happy sailing!