Yeah, no mate. I get what you're saying, I'm an electrical engineer. There's no clamping the piece. The tab meets the base of the screwbox and the repair is there. I got just a touch of melt on the box right at the back and a little spatter. Literally, I could grind a slight 1/16" or less off the back, use a metal chop saw, run it through a portable band saw, etc, to clean it off, but deburring would be a concern. This has always been a xxxxx to thread in and wouldn't tighten. But I'm restoring my garage and got irritated and decided to open it up. The screwbox basically just spins until it hits a side and travels. Working the box back on, I'm screwing through it, but loose, it's still not tightening easily. I know there's lite spatter damage, on top of nothing held in place, so I understand that's probably contributing to difficulties. If I keep running the screw in and out, will the threads clean up or wear enough on their own to clean up the spatter? I'm restoring everything and debating debating sand or bead blasting everything. Be easy if I just had a xxxx tap.
I might coat the vise in degreaser and then oil it nicely, or even paint it. Lite sand all the contact slide surfaces. If I keep having struggles with the weld, I'm going to build a cage and with JB Stick, 2 part liquid, or this type I use with a high metal content for magnet test body repair which is also machinable.