Wow. I am impressed with the anecdotal stories. I may have to try that the next time I do a brake job. I would have never guess that cryo freezing the rotors would give you such a performance gain. I know how you heat treat metals but I don't remember in material science much about cryo treatment. I think I sold my material science book. If I still had it I would be checking it out.

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My Daily : 96 E-300 Diesel with 195,000 miles
Retired: 92 300D 2.5 T 345K miles and for sale
Retired: 95 E320 157K miles and currently parked with blown engine

Both retired cars are for sale as is my w124 shop inventory