I do know the order is Original Thick, Thin Silver, Nordost MMF.
Not sure when the change was made to Thin Silver as I purchased mine late 2006.
I have a call into Krell so hope to answer that question soon.
Seems like there are quite a few of us wondering about this issue.
I did call Tara and they said they would make me a set using The One cable for about $3000/meter. Way to expensive for me especially as CAST is supposed to end the need for these super high priced cables.
I'd jump into the MMF if it were not for a few posts suggesting that Nordost is not the best wire to use with Krell gear, despite that fact that it is Krell's and Dan D'Agostinos personal recommendation.