Am I correct in assumeing that stainless steel and copper wont produce a battery effect?
If so, would you be able to use those McMaster tubes for both the cups and the needles?
For example, you could use the 8988K78(0.013"od/0.007"ID) for the pins, and then solder or ASepoxy 5560K69(0.020"od/o.016"ID) tubes to a 2mm cpper plate, and that would give you the cups. That way if you dont have tiny drill bits, you can still try this.
Would such an idea work?
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