I really enjoyed the build. All seemed to go very well.
For the initial startup - following the steps listed in the instructions: first, the three driver tubes lit up as expected. Following the next instructions - connecting the speakers, and installing the rectifier tube and the LEFT side only EL34 tubes. When I applied power the V3 and V2 tubes both lit, but the V2 tube then began to glow intensely, significantly brighter than the V3 tube. After about 5-10 seconds - ever brightening, I shut down the power. The fuse did not blow. Each of the bias adjusting screws was set in the 12-6 o'clock position.
I have since reopened the bottom and have checked all of the wiring and soldier joints. All seems to be correct. I did not swap the tubes to see if maybe there was something amiss with the "bright" tube.
The second time around, I first turned the two left bias pots all the way counter-clockwise, to reduce voltage to a minimum. Still the V2 tube was significantly brighter than V3.
So, what now my friends?