As you've seen from all the above posts, the headliner is a problem if you try using the aluminum panel, as I did. Someone, but now I forgot who, was successful gluing a soft headliner in place and not using the aluminum panel. I think now FFR may be including a foam-backed piece of fabric so use that or some other soft stuff and not the aluminum panel. Check out a yoga pad for a soft, insulating headliner.