Music Lover
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Those fiberglass corrugated sheets don't look like savers to me - especially after you have them off and with screw holes and cracks. Your recip saw and a nasty demo blade and cutting through the wiggle board joint sounds like the best plan. Waste no time on it. The wood from the framing is what looks like keeper stuff to me.
What they said.Rip them out and toss them, not worth trying to save. And I save everything I can.