Hey SDS-Page,
How did the Scott amp turn out?
I'm going over my Scott 299A (which looks like a B) right now. I haven't touched it in a few years. I recapped the output tubes, phase spliters and power supply about 8 years back. I'm finally changing the coupling caps on the 12AX7s now. Hopefully that cures the intermittant pops this amp has been spitting out. I just scored a set of 8 Reflector 6P14P-EV (Russian 7189) off Ebay. These should last me for a while.
I pulled some 12AX7s from an old HP gas chromatrograph years back. These were a mixture of Dutch Ampex and Un-named W. German tubes.
Sometimes we do luck out.