Thought I'd post an update in a new thread - because it seems like a whole new world.
I got the Z Air Break today and that finally allowed me to play the new Express build with a decent signal level.
All I can say is WOW and OMG.
It sounds fantastic and I finally get that Express magic of chime to fuzz (at least my version).
I have a few old tubes from a Wurlitzer 4602 chassis so I'm trying some of them in V1.
My LP has a DiMarzio Super Distortion in the bridge position and a 36th anniversary in the neck. The SD is a little hot so the the amp seems to like an old RCA 12AU7A in V1 (resists breaking up a bit more which is good for the LP).
Still lots of playing around to do - but I think it's going to sound awesome. Heck, I think it already sounds awesome - and I haven't tried that many tubes yet.
I ordered some NOS 12AX7s - I think I'll order some NOS lower gain tubes as well.
BTW - the "hiss" is gone with the Air Break.
I'm going to have to get my recording stuff set up to see if I can capture any of this "on tape" (okay - hard disk).
-Paul