I actually enjoy pounding and shaping metal.. If you think about it the whole entire car is overlapped everywhere and spot-welded. Nothing is cut out perfect and welded in... when I did the floorboards on my son's Power Wagon that's how I did it. I cut out a perfect patch and welded it perfectly all the way around. In the end it was a massive waste of time and I don't think it was any stronger.. this last truck I did the floorboards I put the patches in and drew a line around where they go in. Then I came back to in and cut out so I had a 2in overlap everywhere and spot-welded every inch or so. Of course one here and then one over there not doing it all in a row and warping the metal. Then I just use some car type sealer like the factory does and it was just as nice once it was painted over as the ones I did for my son's Power Wagon...