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cryo.....
It will certainly work! I left that portion out for the sake of simplicity. After the final tempering, go into the cryo for 6-12 hours, then re-temper at 25 degrees higher than the previous tempering cycles. You will realize about 25% more cutting ability from 5160. And as long as you have edge hardened, there will be additional "springyness" in the spine.
The one area to watch is warming the blade back to room temp once you've taken it out of the cryo. Thermal shock is a very real possiblity here.......... I place blades between two layer pieces of ka-wool and let them warm slowy to room temp, then go to the temper.
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