I want to replace the chainplates on my 34'' True North, Stan Huntingford design, the plates are glassed into the deck only. They are not glassed into the hull at all. I need advice on size, thickness, of the plates and I was thinking of strapping them on the outside of the hull. I live in Guam and don''t have ANYBODY that seems to know anything about anything...kinda sounds as though I am describing myself. Thanks and Hafa Adai!