Originally Posted by captain jack
they probably installed the hardware before the deck and hull were bonded together. someone correct me if I am wrong but, I believe that is usually the way they do it.
it's like the way auto manufacturers install the engine before the body is put on the chassis. that way it's only the repair mechanic that has to cuss at the hard to reach parts.
Correct. Very common on a production boat. When I replaced the fuel tank on my CS27 I also replaced the hoses. The vent was installed high on the transom and the cockpit well is only about 3" from the transom at the bottom and tapers to about 2" at the top. I cut a hole and installed an access plate like the one posted earlier.
The toggle bolts are probably the best least invasive solution. We sell similar ones where I work, have been meaning to buy a few for the toolbox.