Re: Ericson 27 Newbie Needs lots of advice.
Given how close those shroud chainplates are to the edge of the deck, if they need replacing anyway, I would just move them outboard and bolt them on the othe outside of the hull. You'll lose a little bit of sheeting angle; but not enough to worry about.
Like in this pick from the end of the second link, above:
"If a man must be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most." --- E.B. White