If they're all on the same base piece, you're either going to have to get awfully good with a pinpoint flame and differing grades of solder or use a laser welder. The laser welder doesn't make any appreciable heat, so you could just go from one to the next. Of course, it also costs about $5000, so there is that.
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ESC
Soft glass on a Minor/concentrator since 1996
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