So today begins the dismantling of my Prindle 19. I want to cut an inspection port in each of the bow pontoons. I have no idea what a prindle 19 looks like on the inside. However the catamaran is in need of some TLC. Does anyone know anything about this type of procedure? I'd greatly appreciate any input/ideas!
Thanks!

You said the P - word!

I will give you one major tip. Don't put an inspection port in any catamaran in front of the front cross beams. The loads up there will certainly cause a hull failure.

Somebody suggested looking inside with a web cam, something I hadn't thought of, and found quite useful. You can attach one to something flexible and see quite a bit from the rear inspection ports. Don't know if that would help, since you didn't say what problem you were trying to solve...

Check this thread you may find most of your answers.
http://www.catsailor.com/forums/ubbthreads.php?ubb=showflat&Number=206710&page=1

Here is how I do it.
http://themanshed.net/archived-projects/g-cat-catamaran/?g2_page=2

Except I use Epoxy now instead of Poly resins. There are a lot of posts against messing with the bows on Prindles. But I look at this way you can fix it before it breaks or afterwards.