Just a random update. My Dual Sta is running strong. I've ran 24 hours straight before and it gets hot but nothing too crazy. I had to strap a 1k resistor across pin 2 and 3 of my meter pot to 0 the meter for some reason.
I wouldn't use NOS 6v6 tubes if trying to get both units running in stereo together. Used matched NOS tubes I paid way too much for and they sounded amazing but the discrepancy between outputs was too much to bare any longer. Using matched JJ's I got a long time ago and the unit runs perfectly in stereo. Sounds fine. New production 6V6 recommendations welcome.
Love it on vocals. Just tracked vocals for a friends album blasting the unit and it just makes everything sound upfront and beautiful. I like it better than my LA2A when ran at similar attack and release (#2 is about the same-ish). Would love to make a HPF for the Dual Sta though as it will considerably suck bass out of a whole mix at faster time settings.
Overall recommend the build as long as you know what you're doing already....