The lugs are NOT silver soldered. They are Wolff soldered using the same solder as the ribs. If you are trying to beat it to the point of getting silver solder to melt, then you have surely discolored he metal to the point of needing re-bluing. And possibly compromised the ribs. But this would not be an issue if they were properly clamped to prevent movement.
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B. Dudley
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