I am glad I was able to find it and share it...I have kept all of the Martin Colloms' reviews on equipment I either own/owned or am truly interested in long-term. This is definitely one of them.
Interesting choice of words you use...ultimate tube DAC in the world. What SS DACs do you believe are superior?
FWIW, I thought someone told me that Lincoln Chen Editor of AudioTechnique used the AN DAC 5th Element as his digital reference for a number of years...and recently went to full Wadax. So that might be one answer...but nevertheless would appreciate your thoughts on this.