I agree with the cryogenic heat treat, not cheap. As for the various steels, I've been here for less than a year and have obtained from the Yard knives in SR77, 154CM, SR101 and hopefully INFI soon. From Swamp Rat I scored a D2 blade as well. Jerry has mentioned the testing of other steels and Horton is venturing into CPM M4. I wouldn't mind seeing the Yard trying new things, but I also wouldn't mind if they stayed with what they have now either. Just throwing it out there.