A piano tuning lever is basically like a small socket spanner with a big lever on it. They can cost up to US$700, and the cheap ones are useless.
I wish to make one. It will be much stronger than the commercial ones so it won't twist and flex like they do. It will have a square hole so it doesn't slip or damage the pins.
The hard part is to make a square hole. I think I will make a tapered steel pin, drill a round hole in a steel rod and put it in the forge until it's red hot and hammer it around the pin. Attaching a handle will be easy. Or I may as well bend the rod in the forge too.
When I tune my piano I won't be using this "equal temperament" rubbish or any electronic devices! I want to tune it the way Mozart or Bach would have wanted.
Any better suggestions for making a tapered square hole in steel? I have access to a milling machine, drill press, lathe, welder and forge, and lots of files.