Thanks everyone for the response.
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I ended up drilling out the rivets and replacing the fingers with a similar wafer switch with basically identical fingers kindly provided by a local ham, I used small nuts and bolts rather than rivets to secure the replacement fingers.
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I wonder what causes the band switch damage, I suppose it could be dirty contacts overtime or possibly not enough delay hot switching, or perhaps pushing it too hard / high swr
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I'm curious about the grey lines on the anode in the pic below, they kind of look like pencil marks.
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