I worked for the metallurgical industry until 1980, producing precision parts for aviation, railway, automotive and machinery.
I am the grandson of skilled craftsmen.
My paternal grandfather made carved wooden furniture.
My maternal grandfather made artistic bowls, trays, cups and centerpieces with serving utensils of Krupp cannons, that he called "German bombs". Shaping with a hammer and chisel, without heat.
I made my first knife, a classic Bowie design, at age 14 or 15 from a 12" flat Nicholson file. I didn't know that if I did not decrease the hardness of his blade, there is risk of breakage... and that's what happened.
Then I learned.
Do not know what became of that knife, but I'd like to have it today.