sidewall demaination

We met with a few people who do RV body work. $15k to replace the whole side of our 180. We pulled a window out and looked down into the delam area, no water damage. The filon is just falling off the plywood. You can see bubbles all over the wall from the middle of the windows down. Its definitely a factory defect, but FR wants nothing to do with it. Thought about hiring an attorney, but we'd probably just be throwing good money after bad. FR probably has an army of attorneys fending off this sort of stuff.  We've decided to cut out a section from mid window to the top of the storage compartments and replace it with new filon. Then add a flat trim seam at top and bottom of that new piece. Trying to pull it back and adhere again or add epoxy, etc would not be easy, so we made this choice. Hopefully it looks ok. I removed all of the decals on the opposite side this past weekend. We're going to add a brown vinyl piece down that side too to try to make it look the same. ??? We'll see how that works out. What a freaking nightmare this RV has turned out to be. I will NEVER buy another fiberglass RV. Who would design such a thing that is so hard to work on. Live and learn.