Easy-outs can work, but I don't much like them for a seized thread, because they're small and brittle. If you do break one off, it will just make it more difficult (and likely expensive) for the smith to fix the problem. I would much prefer to bore the threads out to the minor diameter, then use a tap to clean them up. But if you don't have the proper equipment (milling machine or lathe) then probably best left to the smith. It's possible with a drill press, but you'd still need to know what you're doing.
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grym
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