I did my homework......in fact, the article you refer to was a retort to an email I sent him. He claims his super feedback gets rid of hyteresis and to prove it he created some test that proves nothing (except a measurement). What do you think?....instead of quoting him.....since he says basically nothing. BTW even all ferrite core coils sound different from each other. If you made the very coil he uses out of purer wire it would sound better.....if you cryoed it....it would sound better. If you use a toroid coil instead of an incased coil it would sound different. So, what is the best? Did you do extensive listening tests to coils to know......or do you believe all coils sound the same? I told Bruno the only way you would know if you got rid of the hysteresis in a ferrite coil would be to A/B his coil with an air core coil and listen. This is how you know somethng.....by actual listening tests......not by a made up measurement test that has no basis in sound quality.
This game is so much more complicated than a simple measurement or a guess. You have to listen to everything you do......to really know if what you "think"...is what is "real"....and what is real in audio.....is what sounds most transparent.....and only the ear can judge that.
It is the peak of stupidity to think that you cannot swap a few parts and improve something Bruno designed. If Bruno listened to everything he did and was all knowing.....then maybe not. He does not listen to everything he does and is not all knowing. It is stupid to think otherwise.
Obviously, you "only Bruno is God" worshippers think as you do. I think everyone is God.....so I worship everyone. Every thing and every person contributes to the whole. All souls are pure and lovely.....knowledge is vast and infinite....no one person can hold it all. We need each other......Tweakers need engineers....Engineers need tweakers. We are one....most holy ones.