2005 Winnebago Minnie, the dreaded cabover leak

Here's a pic ">pic
of my 2001 31' Itasca after about a day's worth of "dismantling".
There was foam inside the steel frame on the wings,paneling on the inside of the wings, and door skin on the outside, under the fiberglass.
My front wall came off in one piece from the seam on the roof, which was under a molded fiberglass piece, down over the radius and mated with the "sleeperboard". My sleeperboard was all rotted out. It was secured to the walls at the back of the cab, to steel pieces of angle iron along the bottom of the wings, a steel piece at the joint between the sleeperboard and front wall, and was also screwed to the roof of the cab around the cutout.
You have to take care in removing the trim pieces that cover the seam of the wings and front wall, so they can be reused.