Do you have an enclosed underbelly? If not access to the tank is very easy from underneath. As far as a fix goes, can you see the screw? If you can get at it to remove it you may be able to repair the hole with some epoxy or flex seal tape.
Progressive Industries EMS - Hardwired
Equalizer 4 Point WDH
2021 Ford F350 7.3
Air Lift Rear Bags w/ On Board Compressor (Pending)
2016 28BHBE - (Traded and Missed already)