Ok, so I was browsing and ran across this really interesting looking Dovetail Marker (gauge) from a company called Collett Engineering, which appears to be out of business. I say interesting because it looks quite complex for such a simple task.
So that made me curious as to how it works and why it might appear so complex. However, I can find no videos where one is used by doing a keyword search. I also have found next to no info about them by using Google. Other than a few for sale on that auction website we're not allowed to name. So I figured I post this on here and see if anyone knows anything.
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