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Gday Dave
Just be careful with the guitar wire
as the end may not be a point, and wont give a round hole.
The acupuncture needles have a sharpened "round" point
vs the triangular point on some other sharp pointy items.
I have a microscope view of the differences in some of the points somewhere.
By only just piercing the foil and rotating the needle,
vs pushing all the way through, you can actually get a smaller circular hole,
but you need steady hands
Andrew
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