Recored the gunwale caps, the fuel tank hatch and the aft corners with the 1/2" baltek. Turned out nice and solid.
After much thought, we decided to glue the floor coring down to my supports. Did not glass the underside. I can't remember the name of the adhesive he used, but, it was green and a 2-part epoxy in a double caulking tube. Pneumatically dispensed.