I like how you've said there is lots of misinformation here and then pretty much agreed with everything that's been written, apart from how well this thing takes pedals, which is subjective.
The amp already has a master volume mod, depending on what type it could be fairly hacked up already compared to a 'collectors piece'. someone might even have had a go at clipping those bypass caps, who knows. Since there is an MV in this amp, you can keep the volume lower while readdressing that capacitor/resistance relationship of the channel volume right?
lots of people dislike bright caps, but I don't really have a problem with them.