I’m in the same boat about volume. I’m using a Weber Mini Mass attenuator to keep it down to home levels. Next build will probably be a Princeton 5 watt.
If you want the documents, send a private message.
Also, for anyone taking on a similar project, some of the resources that helped me in terms of safety, the order of operations, etc, was the following….
Rob Robinette has a lot explaining circuit design, mods , safety , etc.
Tube Amp Stuff, Honda S2000, Mazda RX-7 Improvement and Modification
robrobinette.com
Mojotone has manuals for a lot of circuits. I read through their 5e3 manual to get a good foundation.
And Fazio Electric is perhaps one of the coolest people on YouTube, and she works on some pretty amazing gear.
I probably should have put a disclaimer on the beginning of this thread, but there’s some pretty serious voltage running through tube amps, and I don’t think you can read too much or take too many precautions when it comes to safety with this kind of project.