Perhaps the phrase "If properly done" is key.
The BV8 -in my opinion- was NOT the proper transformer to use. The BV11 is a simple conversion to "properly done".
As much as I respect Sattler, he's wrong on this. The plate impeadance of the two tubes is radically different, they could never sound the same with the same transformer. So as Kieth has heard my mod idea (swap the BV8 for a BV11) does work here. BUT looking back at statements made by Bore (who did excellent workotherwise), the main guy at Neumann in the late 50's and early 1960's, he was unappologetic about the U47fet not sounding like a U47, and designed a transistor AC701 substitute that sounds NOTHING like an AC701, so I think it's safe to say his position was that the customer should move on, and forget the VF14 sounding U47's.