Then again, I am currently palying with TX tubes, and I am just leaving the voltage spec of vintage AB1 commercial amps. Super high B+ is not a requirement.

If you get a custom SE output, say from Jack of Electra-Print, a 5k/80 mA 15W version would be useful for a lot of tubes. Up to an 845 at 7-800V. Very versatile, good for 300B, and even a high load 2A3.
cheers,
Douglas

BTW. DIY Hi fi still sells the output transformers from there ‘Lady Day’ amps. these can be wired from 2.5K to 7.5K and are a steal at $190 a pair shipped. Look under ,accessories / magnetics…John

Building something that is a bit different, and inovative is a lot of what makes this fun. Just because the general population hasn't recognized something as good, does not mean it's not. Perhaps even excellent, yes?.

The Galahad schematic is still on my build list. I figured a way to combine my next two amps into one convertible just so I could do some more varied building. I don't think I would change anything about it. One of the attractions of the pentode front end is its nearly constant output Z with signal level. The plate Z can chage a lot, and the whole thing will still be dominated by the plate load resistor. That's probably a good thing...:)

I do suspect that part of the multitude of 2A3 amps is due to the value of personal experimentation. I know you can relate with the "I'll build it myself and see" mentality. Probably also because it work well too.
cheers,
Douglas