Well, I got the tubes in, but when I installed them, I somehow managed to break 2 of the preamp tubes putting on the metal retainers. Couldn't figure out why no sound until I checked. Put the old preamp tubes back in, but then had that horrible whooshing, crackling static. I took out all the JJ tubes and put the old Mesa's back in, but the damage is done. I must've screwed something up turning on the amp with broken preamp tubes. Looks like a call to the repair shop.
So, until then, I'll hold off on my review. Gotta say, though, what I heard while playing thru the static was much punchier and louder....aside from what I must've broke on the amp, the JJs seemed to sound better....we'll see.
RB