Jim I think that is what I love the most about your designs. Tube rolls are like going to a gigantic buffet.
We each have different rooms, different speakers, and amps with different damping values. A tube or H+ voltage in my system might not work in yours. Its great to be able to dial in the sonics.
For those out there that feel their C2's are good but not perfect, then check your H+ voltage and try some different H+ drop down resistors at R223 for the Cornet 2 and R313 for the Clarinet.
I bought a variety of 12 watt Mills wire wounds for this chore. I think I bought 0.25, 0.33, 0.5, 0.75, 1.0, 1.25, 1.50, 1.75. 2.0 and a few other values. The idea was to have enough values to nail down the H+ to the exact voltage I wanted to try next. You can buy these from PercyAudio.com (no affiliation other than I really like his service!)
For those willing to play a little with your heater voltages I believe you can achieve even more impressive sound.
I mentioned here before that I take my gear on the road and show it to audio groups and with a tube roll or two I can nail the sound in most rooms in just a few minutes of listening.
Cheers!