Thought I'd go back and show more of the core support repair. I have said a lot of these patch panels are made for Lego cars and not just Buicks . Here you can see both lower corners are square and the left side is not wide enough. Here I have marked the corners to be cut/rounded and anyone familiar with these knows that the hump or raised relief isn't stamped in the repair panel. Actually none of it is actually stamped, it's made on a brake which is why I call them Lego parts. So I have heated and hammered and pressed in the hump/relief area to match.