Earl,
Making them is the same as re-grinding except you want to harden and temper them after grinding. I've made many screwdrivers from drill rod (O-1, oil hardening).
If you are not familiar with hardening and tempering I'd hate to give you instructions here as it requires heating the metal to about 1200, quenching in oil, polishing off the soot then drawing the temper by reheating to around 600. It is very doable with oxy/acet. torch, and a good eye for the color changes.
That grinding jig looks good, but you can imagine after doing it for 35 years, I probably an get by without it.
Best,
Steve
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