Here’s another tip I’m giving away for free… These are small self-tapping sheetmetal screws that I’ve put in place temporarily to hold the lower section snug while welding the plugs. These plugs are a one-shot-deal – they need to be strong and also minimal in size since we cannot get in there and grind them smooth once done – so they need to be “pretty” – and as flush as possible, and all the same size would be nice too…