The floor pieces fore and aft of the engine (and extending into the bow) are fiberglass shells with a plywood core. If you're careful you can replace the plywood or reinforce these yourself. I did a couple of the sections on my 91.
2005 X2, Viper Red, MCX, OJ TZ-X5 prop, PPass, rear 750 sacs, KBS, IBS, Bennett Wake Plate, custom wake shaper
(previous) 2001 X5, 1991 TriStar 190