This is the rear left corner of the vehicle. A Portable toilet was stored here and I'm assuming it caused most of the water damage. I had the same problem in my Sportsmobile. Altitude changes caused the fresh water tank to overflow. I never did figure out how to fix it other than give my porta potti away. Turns out that was the right thing to do. Stay tuned for a composting toilet post soon. Luckily under the wood was the nida-core like base which had absolutely no damage. I'm now a huge fan of these structural panels.
Lets just concentrate on the seat cushions for a second. They turned out really nice. With the upholsterer's wife helping I think we did well. The back cushions..... They were on sale at Sears for 10 bucks each and they fit perfectly. They are now gone and I'm still struggling with exactly what to use.