I haven't done it but know it is a pretty serious job. That being said if you bulkheads are at all wet and appear to be about to fail, the NEED to be replaced. As you stated they hold the chainplates and therefore hold the rig up. I don't know how difficult they are to remove (my PO replaced mine shortly before I bought the boat) but once out you can trace the pattern on a new piece of marine ply. I also don't remember the particulars but I remember a F8 member having to redo a bulkhead after cutting and applying epoxy. I think he didn't cure he epoxy properly and it didn't cure. But it may have been a matter of tracing the wrong bulkhead (starboard v. port). Chris D toy box eastport, md
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