I'm in the process of rebuilding the transom on my 1976 starcraft 18'. I had to weld on a new outer skin. My bilge plug hole is rotten. It is also about 2" from the lowest point and to the left of the knee brace. I'm thinking of relocating it to directly behind the knee brace by welding a piece of aluminum pipe the same diameter as the old one. This will allow the boat to drain completely when it sits out in the rain. Anyone ever do this?