Serendipity continues or "Holography part II"; take your choice of titles for this post.
After I taped the insulation to the glass door in order to conserve heat, when I settled back into the sweet spot for a long listening session, the sound-stage was balanced. (the insulation on the door served as perfect room treatment) It had never been balanced before; the right channel was louder than the left channel, and turning the left channel up was not a good solution for holography.
A balanced sound-stage is essential for this phenomenon, now that I had it, I couldn't stop listening; instruments floating in air, non existent speakers, everything there is to be had with good holography was mine; this is the end of the line for me, my quest is over.