What did you use for the backer in regards to the large headliners?
Not sure what you are referring to :noidea:
The center section of the headliner (where the dome lights are mounted) is 'hanging' by 6 wood screws that hold it up tight against the side panels, which are just cloth w/ 1" foam backing - adhered directly to the ceiling (i.e. underside of the deck).
I'm thinking I could run a set of screws near the edges of the center section to more securely fasten it. Sort of depends how much wood there is in the underside of the deck to screw into. I'll have to go through some old pictures to refresh my memory.
Regardless - any improvements will be on next year's list.