"After the wood is epoxied to the cover and before you seal the plywood, bore 1/2" to 5/8" holes in the new wood only, then fill with epoxy/cabosil and you won't have to drill through the wood, just through the new fiberglass plugs. I know it's overkill, but not hard to do."
This is what I have done on all that could be done. The West 610 (I think) with the mixing nozzle is too easy.
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