@wynnytsky Thanks for your suggestion. I went through a lot of ups and downs over the first five weeks of break-in. Some were no doubt due to changes in sound. Others due to my own impatience and moods during listening. After about five weeks both my listening brain and the the 006 stabilized. I have been happy with the end result and have taken a vacation from obsessive critical lisitening. I have concluded for now that I am getting the best sound from a DAC that I have experienced and am trying to just enjoy the music. Of course the urge to tweak will return, but I am trying to resist for now. In the future, I may try USB line treatment or experiment with streamer upgrades. This hobby presents opportunities for endless experiment.
During the break-in I did buy and sell a Coincident Statement Line Stage. It had a beautiful tube presentation but I still preferred the Hegel P30. So, for the record I am more than satisfied with the sound I am getting from the 006.