henry crun
Your post reminds me of two of my apprenticeship jobs.
We were given a fist sized lump of steel from the foundry and had to carve it to a one inch cube, scraped flat - no machines allowed, only hand tools.
When we had completed that to the training managers satisfaction, we were given an even bigger fist sized lump of steel from the foundry. This time we had to carve it to a one inch thick by four inch square plate, scraped flat, again no machines. Then we had to cut a one inch square hole dead centre of the plate - we were allowed to drill a half inch hole in the plate, using a hand drill. Then the previously made cube had to fit the square hole we had cut in the plate - every whichway!
We learned how to use hand tools and measuring the hard way.