@teajay - thanks for that info; that's great to hear. Last year I bought a used Aric Super 6SN7 and added that to my 'preamp stable' along with an LTA MicroZOTL Level 3; I liked them both equally but differently, and figured I'd alternate them month-to-month for sound variety.
Then I decided to send in the Super 6SN7 in to Aric for his optional upgrades. I played a very familiar record for about 15 seconds and decided right then to sell the LTA (which I did!); in my system and my room, Aric's preamp outperformed it in every way; my other components love it. Nothing against the MicroZOTL at all, and like Aric, they offer great support; it's an awesome preamp - I just didn't need 2 and I had a preference for 1.
Also, my MicroZOTL Level 3 came with a pair of 12SN7 tubes; I had to take off the case and flip a switch inside to choose between 6SN7 and 12SN7.

