George, haven't heard back from Roger yet.
For panels like the one shown, if you have a replacement and the top panel is a throwaway, I've used a cutoff wheel to remove the bulk of the panel, leaving only a strip of metal where the spot welds are located. Now with a strip of metal that you can roll up with a pair of pliers, you can use your choice of the spot weld removal techniques from the other thread, and just roll up the metal strip as you go. If it doesn't want to roll up, you still have too much holding the spot weld, drill a bit more and try again. If you wanted to repair the existing panel like Roger did, then a spot weld remover and gentle prying between the panels should show when you have cut through..
