Thanks for the replies guys, I wasn't sure if my question would be seen as this thread was from back in 2009. I posted up again as a new posting, hope this is not a problem. This seems like it is going to be a BIG undertaking and I have no glass experience. I read and reviewed the photos Turbocat posted, it just looks like removing the top deck will give the easiest access but I don't even know if I can still find new top decks. Plus, not even sure how to get the top decks off.
Thanks for the help.
I think going in through the side is a better option. A hole-saw may not provide a large enough hole, you may be better off to use a jig saw and cut the access through the side of the hull, then reinstall the panel you cut out. Removing the decks is really hit or miss...you may break the deck and I really doubt you'll be able to find a replacement....then again, maybe fixing the deck would be easier than the hole option?