[chevroletrucks]

Not sure if this will apply to what your trying to accomplish but while replacing my rear cab support I had accidentally miss calculated where to drill my spot-welds and ended up with a few extra holes to fill. I took a piece of sheetmetal to the workbench and using the spot-weld cutter again cut out 3 holes in the metal, I then picked up the solid circular pieces that fell thru and welded them into the holes. It was an exact fit. I would imagine if you measured the size of the hole the spotweld cutter makes and compared it to what your filling it may be close? Even if you have to enlarge the hole slightly, you would be filling it with metal again.