abs headliner - newbies like me be careful
I thought I would update this for others like me.
The REM headliner/sail panels are NOT really that wonderful. The covering is foam backed and ends up being kind of "puffy". The same is definetly true of the sail panels. The original sail panels had an almost paper like covering and the replacements are foam backed. They just don't look quite right.
If you have your original stuff, I would recommend you just recover what you have using unbacked cloth or naugahyde instead. Use 3m/Scotch 90 adhesive. You'll be a lot happier and have the money to spend on go fast parts!