What!!! Oh My...
Rootboy came through for me when I was searching for a spindle to convert a cottered crank to square taper. It was years ago. He was patient and explained how to make a 5SB work. He also turned me on to Sheldon's archives...
God Bless His Passing...
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No matter where you're at... There you are... Δf:=f(1/2)-f(-1/2)