Thanks to you all for bearing with my on-going queries and comments about the phono stage in the T7SL pre and tube rolling.
The tubes for rolling have been ordered, and have not yet arrived, and I've mainly been listening with my WPP100C phono pre.
After a day of doing so yesterday, I decided to try the T7 again. Wow! It sounded terrific. The articulate bass I had been missing was there in spades, along with lots PRAT excitement.
So, maybe the unit needed more burn-in, who knows. I am still looking forward to the tube rolling, but, as is, it seems I will be able to bear parting with the WPP100C after all.