I cant work in shorts in the shop or landscape, get beat up. Kneeling at times as well.
I've learned a lot of technique from this guy
https://www.youtube.com/@kengodfrey1956/videos
Jimmy Diresta's latest video project is a nice exercise in metalwork, including some things he's not done previously. Two metal shop stools.
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The most expensive tool is the one you buy "cheaply" and often...
I like this guys channel. https://www.youtube.com/@MakeItKustom. He explains how to do the work well. A lot of the time he uses the machines and then goes back and shows how to do it by hammer and hand. My only complaint is he has a lot of projects going on at once.