Lots of fuss about nothing! Either way, the 6v6s are pottering away happily at 260Vrms. It's surprisingly loud actually, really wasn't expecting it, or the low end frequency response!
I've only got some shite Volvo speakers on it for the time being (not blowing up my Rainbows on testing!) but there is definitely punch in there.
There is no audible hum, and I mean it, with my ear against the speaker. There is also no volume control, so it's going 100% permanently until I put my stepped attenuator in there...so if it's not making noise we're good to go!