My headliner is back installed and all the parts reinstalled.
If there were replacements, I would have been bolder on the removal attempt. If I broke it beyond repair without a replacement, it would be one big ugly spot on the MH.
I looked at the countdown to kick off images, if I ever do get ambition or desperation to try again I will try your method.
How does that Tostitos glue work anyway?
If it ever came to having to duplicate it, I think I would try using 1" thick exterior insulation board that they use on houses. Using a 3D CAD program I could cut the foam into tiles (Like the Space Shuttle heat shield) glue them into place and then find some filler material to smooth the seams and then cover with fabric. You loose the contour for the visors but it would be light and have good sound deadening.
But that would be assuming I was desperate and ambitious. At the moment, I am neither, I am happy it went back in without cracking more.