You videos do an excellent job explaining and demonstrating panel replacement and prep. I have the most difficulty knowing when to stop grinding welds. I grind too far, get adjacent metal too thin, and end up with a lot of pinholes. Trying to weld the pinholes ends up blowing bigger holes. I searched here and read threads on this subject, and it seems I’m not alone. I think a picture or two of what is accptable would be helpful. Thanks!