I've got a sagging/drooping headliner in my coach. I've removed the 3" wide center trim panel & pulled the headliner as tight as I could & stapled it up. When I attempted to replace the 3" wide upholstered trim with some pretty plywood fascia, the screws pulled out of the disintegrating plywood above the headliner. This really SUCKS!!! trying to look like a hero &...