ebb
agree 5/16th for the thinnest locations.
i"ve seen a significant variance in thickness around the hull.
1/2" to 3/4" for the thru hulls
bottom of keel was approx 1.5" inch
leading edge of keel up to 1.5" glass with up to 2" polyester resin behind that.
thin spots for A-231 are keel void aft (since beefed up).