I’m looking to mount my power pole pump and on my 2002 Sabre I have the single 27 gallon fuel tank that goes around the rear seat post. Originally I was going to mount it on the post but it won’t work with where my fuel tank is. My question is, how deep can I safely drill in the bilge area to mount my pump bracket? I know my fuel tank is screwed down in the bilge area. I’m looking to mount the bracket next to it. Am I safe to use 1” screws there without fear of poking through the hull?