I sorted out a few more things on this. Mainly where to run leads to the Vactrols to get the correct tube order. The illustration below shows the Vactrols as they appear from the back of the amp looking at the circuit board. I numbered them from left to right. Wound up with more gain than I knew what to do with, so I added an extra divider between V2a and V4a, and an un-bypassed 8K2 resistor on V4a. Now there's enough gain for all but the most hard core metal heads, but you can still get a nice bluesy crunch if you want. Now if it only weighed 40 pounds less...