Not Ranked
I will take a stab at it ... This is just a guess , so you find a spot with nothing behind it , Measure exactly mark with a center punch . draw a perfect circle . cut the leather with an x cut (twice ) so you can pull back the leather larger than the hole saw , but not larger than the besel . drill pilot hole , then drill with a hole saw in reverse so the teeth don't grab the glass or metal .
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