Suggestions for sagging floor gas tank access panel - Seafari 20’

[JUST JOHN]

Hello CSC,

So the gas tank access panel had begun sagging noticeably over the last year or so. I was plan on bracing it from underneath, as there's ~2 1/2" of clearance above the tank, with aluminum angle, or other materials based off suggestions offered. I'd like to know if anyone else has had to do this same repair, and if so, how they've remedied it?

I'm undecided whether to just piggy-back the gas tank mounting screws or glue/resin-in new plywood mounting spots in between to screw into...







The tank looks surprisingly ratty for having been replaced in 2010.