When we left off, we had fabricated new breasthook pieces, but they didn’t quite fit as well as I’d like. Check out the previous post if you’ve forgotten.
The trick is to chalk the inside edge of the inwales, fit the breasthook in place, and then see where the chalk transfers to the high spots on the breasthook.
Shave the high spots off with your favorite block plane, and repeat until you get a fit you’re happy with the fit.
You can really dial in a fine fit this way. Not too hard if you know the trick! The last step was to glue it in and coat it with special clear epoxy to seal against water. Then several coats of spar varnish will provide necessary UV protection.