I decided to upgrade my electronics today on my boat and me being the impatient person that I am didn't drill the proper size pilot hole while installing the transducer to the hull of the boat, well when I went to screw the bracket down I broke the screw off flush with the boat. And now I can't get the broken piece out. Tried drilling it out but having no luck. I'm wondering if I should just leave it alone and maybe it's in there for good. Any ideas?

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About an 1/8 snap off in the hull. BTW it's a tin boat