Nice addition, but I have one nagging feeling… Due to the the various bending and torsional stresses these things are likely to encounter, shouldn’t one side have a tab bent out and straightened for through-hole mounting? Even if the whole bottom diameter is well soldered, I can’t image springs that rely on just a surface mount connection holding up to the use (or should I say abuse) I put my electronics learning lab through when I was a kid…;)
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