That makes sense as most will use a preamp for volume control and you can ditch the other toggle switch - that should help with the self induced noise.
That was in Timdalf's WOPL thread I'd guess. A couple hundred microvolts across the band - that's not much for those that don't know. Those are amazing numbers for a 40 year old amplifier. Amazing for a new one too. Fantastico!
It is amazing what a good design, good grounding technics and proper wire routing will do - along with other upgrades. You and Joe have been at this for some time and it's cool to see the results. Great job guys.