yeah, slapping some putty in there, even some extra, lining them all up, and them sammiching them together, and screwing down, will basically make the problem go away.
perfect custom fit basically.
you can even find a type with fiberglass mixed in, when that sets, forget about it. put some in the threads too. permanent
i've actually considered doing this to grivory, packing it with "stuff", to make them more solid feeling and eliminate ANY chance of moisture getting in there.
but it also sounds like the vendor solved other problems.