I have heard one system that I would say produced truly holographic sound. It belongs to a friend and it does not have one esoteric tweak in it. When heard, the effect is mesmerizing. All he has is excellent components and cables that are well matched going to a pair of time and phase coherent monitors. His philosophy matches Mapman and it works. There is more than one way to skin a cat.
I have tried multiple tweaks over the years in my system including Bybees at multiple different times. I have tried the rca bullets, xlr tails, speaker tails and power cable tails. I never had more than one in my system at a time. They definitely produced an effect, but to me they detracted from the musicality in my system. I tried them over and over hoping to hear the epiphany others kept reporting. To me they made the background blacker, but they also truncated the natural decay of instruments. Believe me, I wanted them to work. Fortunately, I was able to sell them without losing money on them. Granted, these were all earlier versions, but I could see no point in spending more on a newer version of something that didn't work for me in the first place. I am not here to argue about the merit of the Bybees. If they work for you, that is all that matters. It sounds as if you have put a great deal of effort into getting your system the way you want it and have used some unusual methods to get there. I applaud you for experimenting and finding what works for you. I certainly would not try to convince someone to not try the Bybees for themselves, but IME they are not the be all and end all. If you search the archives, there are others that feel the same, though more people like them than not. YMMV
I have tried multiple tweaks over the years in my system including Bybees at multiple different times. I have tried the rca bullets, xlr tails, speaker tails and power cable tails. I never had more than one in my system at a time. They definitely produced an effect, but to me they detracted from the musicality in my system. I tried them over and over hoping to hear the epiphany others kept reporting. To me they made the background blacker, but they also truncated the natural decay of instruments. Believe me, I wanted them to work. Fortunately, I was able to sell them without losing money on them. Granted, these were all earlier versions, but I could see no point in spending more on a newer version of something that didn't work for me in the first place. I am not here to argue about the merit of the Bybees. If they work for you, that is all that matters. It sounds as if you have put a great deal of effort into getting your system the way you want it and have used some unusual methods to get there. I applaud you for experimenting and finding what works for you. I certainly would not try to convince someone to not try the Bybees for themselves, but IME they are not the be all and end all. If you search the archives, there are others that feel the same, though more people like them than not. YMMV