Quick update--session went well! Posting full writeup in a bit (there was just a lot there...).

In response to Nelly, this T seems to have really good boundaries. I had some issues with my marriage counselor (MC), for whom I had strong attachment and transference, because his boundaries were fuzzy and often shifting. So I'm pretty well-versed in attachment and transference--maybe too well! And T knows all about my issues with MC--it was one of the main things that led me to start seeing him (because ex-T, who I'd been seeing for 6 years, wasn't really helping with it).