I would have liked to patch in a larger piece. You are almost guaranteed to get cracks welding in a small insert like that. I had 3 small cracks but was able to stop drill and weld them. The trouble is, the shock mount is raised from the rest of the frame and it would be a very difficult shape to replicate. So, I replaced only the flat part. Installing a backer would also be difficult because the threads on the mounting stud would be too short and I would have had to pull the engine to do it.