That's quite expensive binning technique
Actually cedarmills are scaling quite linear. So there is no reason to waste LN2 for every single cedarmill sample. When I and Sam were binning cedar mills first thing to do was just simple air testing with 1.45V if you can't reach 5Ghz here you better step to next sample

If cpu reach 5Ghz+ then it's qualified for next stage under DI- we are aiming here for 6.4Ghz at least, not much CPUs will be able to do this but if it can then congratulations you have 7.5Ghz+ candidate under LN2