I have a 1967 sunfish that had what I thought to be a minor crack on the chine. When we got into it, we discovered that it was an old repair that had broken down and when we got that all removed we have a 3 foot hole that is about 3” at the widest point. What we decided to try is putting some 1/8 inch thick PVC slats inside the hull for support. We plan to use Thixo Flex and pop rivets to attach the slats to the hull since the Thixo Flex bonds with PVC and fiberglass. Then fiberglass over the hole with 1708 and epoxy and finally build up and shape the chine with thickened epoxy. This is our first attempt at fiberglass repair so if anyone has any feedback or can tell us if we’re on the right track, it would be appreciated.