Over cab bunk rot, Serro Scotty Motorhome

I just replaced the front loft area of my Scotty... Sadly I lost the pics when my computer crashed.. The aluminium frame does extend completely around the bed walls.... The floor of the bed is mostly foam with 1/8" plywood glued on both sides and then fiberglass glued to the outside..... I replaced the floor with 3/4" plywood and glued the fiberglass to it. I attached to wall with stainless screws.... in hindsight I might have gone thinner plywood as 3/4 plywood doesn't have much flex. when I attached it to the sidewalls I found that I had a 1" gap at the truck roof attach point... AS my Signature states mine is a 1995.... I've been in contact with other Scotty owner's with newer Rigs and they had aluminum framework across the floor of the loft.... Good Luck with your project