See no screws in cabin upholstery. Just don't see any way to remove seats. Can't get to screws under seat. They had to install somehow. Also where could I purchase metal hangers for backrest above rear cockpit. One side hade tiny philip head screws holding but see open area for hangers but none on bulkhead.
The headliner is held up by screws. I believe that they mounted the board first, then upholstered the board. I suspect the screws are stainless so trying to use a magnet wouldn't work.
If I were hell bent on getting under there, I'd remove the upholstery first, then remove the board. You'll need to re-install and then re-upholster.