If chainplates are bolted to some bulkhead, as is frequently the situation, inspect the bulkhead for indications of weak point — discoloration, delamination, and rot. Chainplates are highly stressed, and may work and induce leaks where by they arrive with the deck. A mast that is certainly stepped on deck http://ricardoardow.blogminds.com/about-rigging-screws-for-boat-9372593