Regarding tools to create those circular copper islands:
Searching the web for "diamond hole saw" I see lots of options.
That banggood price was probably for the whole set, not just one as I had been assuming.?
Probably best done with a drill press, not just a hand drill.
Jerry
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On Wed, Dec 11, 2019 at 07:38 PM, Jerry Gaffke wrote:
What tool did you use to cut the circular islands of copper with?
You can buy miniature hole saw bits, but they are expensive:
? ? ??
Being cheap, I'd first try taking an angle grinder with a cutoff disk to an old drill bit, leaving the center and a "wing" on each side.
