I don't know the answer, but do a good search in the lockers etc. The coring may stop where the bulkheads are glassed in. So observing in say the Settee lockers, you might be able to see the
core stepped down to solid glass near the bulkhead joint. Also look up in the bow/chain locker, you might see it step down to no
core at the bow edge etc. Just a thought. Of course, it could be cored only above the waterline also....