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I made leaf springs for Kozo engine from spring steel strips. A friend of mine had a punch that did the center hole, and a shear for cutting to length. I suspect a chisel and hammer would suffice for this followed by grinding the ends.
Are you sure Elfric didn't have one too many Elfensteiner stubbies on his lunch break?
Looks good! How did you get such a clean, smooth bend in the curved piece? John