I've started repairing the floor in my father's 1988 Stratos. I was worried that the boat may have been water logged, so I wanted to cut some of the floor out to see before I spent a lot of money on it restoring it to use. Once I ripped up the carpet I noticed that my father must have replaced the floor himself at some point. I cut out a small spot where it was the most soft to inspect underneath and everything seems fine to me, although I really know nothing about boats. It looks like most of the center section of the floor was cut out and plywood was slid back underneath some of the remaining fiberglass and reattached using screws, then glassed over top of everything. My question is, should I just cut out much of the same spot and replace it similar to how it was done in the past, or is their a better way? I'm having a hard time trying to figure out how to get the rigidity back after I replace the plywood.