> This metal is very soft, and is permeable. it's definitely not
> Aluminum. It was just sandwiched inside, with nothing screwed to it,
> so it deosn't seem to be a strengthening device. I'm wondering if it
> is a magnetic shield. Is there a way to tell whether it is MuMetal or
> just ordinary soft iron? Would one expect a big chunk of MuMetal
> inside a capacitive keyboard?

Nope.




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