Broke bolt in hull. Now what.....

[D Slicker]

So i was installing my Keepers today and broke one of the rear motor mount bolts in the hull :banghead: :banghead: :banghead: :banghead: :banghead: . I tried drilled it and tried a bolt extractor with no luck. I then kept drilling the hole bigger and bigger now I think I can tap it with a new bolt.
Does anyone have any other ideas if it doesnt work?