KUBE -
I AM ABSOLUTELY CORRECT WHEN I SAY THAT EACH KUBE IS CALIBRATED TO THE INDIVIDUAL SPEAKER.
If you can find Dick Olshers review in Stereophile vol 9 no 7, November 1986, he discusses the 107 Kube. He actually had DC offset problems with his 107's Kube.
When contacting the factory Dick was advised that the factory had all the Kube parameters recorded for his specific speakers, which were serial number SN1407, and the factory would be able to build a new Kube for those specific speakers. Each speaker is also marked L for Left and R for Right. This is all documented in the review.
I can only suggest if you still dont believe me, or Dick Olsher, then contact the factory direct and hope that someone there has been there long enough to remember.