Pretty sure this has PCB's cause after I worked on it I flipped out and 7 cops couldn't hold me down.
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The broken straps are silver-plated copper, and fairly thin stock at that.
Cutting and punching new replacements from copper strap would work, but I would worry about oxidation on an exposed copper surface.
Probably not a lot of dissolved oxygen in the oil, though. Plain copper strap might just stay shiny enough to work fine. Never have tried it.
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