Cool video! Thanks for posting that. Never knew all the ramifications of a carpenter’s pencil.
I never knew there was such a thing :-) but I guess people in all of the trades have special tricks and ‘stuff’ to help them. I’ve found ‘See Jane Drill’ to be a very informative YouTube channel.
Back in the 90s when we first got cable, there was a show with an older Black man who went around to people who had household problems and showed how to do repairs. I really liked that show, but can’t recall who he was. (Somehow, I seem to recall ‘Henry’ as part of his name...)