Are you putting in a filler piece of metal or just welding the seam shut once the gutter is shaved away? It looks like you are just shaving a short section at a time to help hold it all together until you can get it at least tacked? L8r
I did the cut and weld 6 inches at a time to hold it all together so I didn't have to worry about the roof pulling away from the inner structure to badly.
