I believe that at least 2 members here have done complete re-builds on their 24' boats and know all the stuff you're trying to get answers on . And one of them is very recent and may still be ongoing.
All of the 24' boats in that group utilized the same construction method with a shared liner that I believe was putty bonded to the hull. It was some sort of new construction method that was incorporated into the design and it created mountains of problems down the road with rot in the wood and other issues.
Due to problems with the board for the last few months traffic has slowed a lot but maybe they'll come along and chip in with the help you're searching for.
Just because something's old doesn't mean you throw it away !