Well, I cleaned up my Pignose (which was quite the job, as this thing must have sat for years to accumulate this much dust caked onto everything!), and spent some more time with it. I'm happy to say that it cleaned up very nice, and now looks about brand new!

I played my new Skjold Custom 5 through it for a while, and I found that with all of the tone shaping options offered by the Skjold pre, I could really dial in some nice tones (including a good bit of useable low end!). Then, I unplugged the internal 15" and used the head to drive my Whappo, Jr. Holy Handgrenades, Batman!!! This thing sounded smoking through the Jr.! It had a surprising amount of clean headroom, and then broke up fairly nicely. Accugrooves are fairly efficient, and I think that you could probably gig out in a number of venues with a B-100VH driving a Whappo, Jr.
But, this was all with the stock tubes, which are generic made in China bottles. After playing around a little bit, I ended up using Sovtek 12AX7's in the preamp and Svetlana "Winged C" 6L6's in the power section. The transformation was very, very impressive! The overall tone filled out significantly, the high end became more musical and harmonically rich, and the lows became both thicker and tighter. This has been one of the biggest improvements I have seen from tube rolling. Big smile on Tom's face, for sure!
I do have one niggling issue, though. The tone controls don't seem to be too powerful, which is fine, but the Bass tone knob doesn't seem to do anything at all. Has anyone else noticed this? I may need to pull the head section out and check the pot for the bass control. Also, I am not too familiar with 6L6-powered amps, but these tubes seem to run really hot. I noticed this with both the Chinese 6L6's and the Svetlana's.
Later, Tom.