I’ve quickly found several versions of this tool using Google Image Search. None of the vendors says how deep the throat of the gauge is, but it looks shallow to me, unable to reach even the center of a 6” thick plank.
Has anyone seen a device that uses the same overall principles with a 6” deep throat (good for a 1 x 12 plank)?
I am also interested if anyone makes one with where the ‘pointer’ is a second arc that carries a vernier scale, thus allowing a more accurate measurement without much added manufacturing cost? Perhaps nobody teaches students and apprentices how to read a vernier caliper these days?
I know. I could make one myself. Sometimes it is preferable to find that someone is already making the tool. It surprised me that I could not find anything like it in my 1934 Starrett Catalog #25.
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