I made a patch out of plastic from a molded plastic muffler display sign.and used machine screws and nuts to bolt it on. Then bolted downhill skies to bottom to protect the tub from rubbing on the ground.
Go to Temagami every year for awhile now, stayed at Loon lodge in the cottage a few years ago, john was and excellent host. He would take us to spots at dusk to fish for pickeral. When it gets dark the ling come out, easy to catch, and lots of them on a spreader.
I like to use a snapon 3/8 drive torx as an easy out, tap it into plug to cut the torx grooves into the plug. wiggle to remove torx, then heat with torch, and cool with a water hose, reinstall torx work back and forth ,should come out, if not repeat heat and cool again. Good Luck