I attenuated it via a vol pedal in the efx loop, worked very well, plus I was running it through the JCA 4x12!
Oh the crazy dude with the jap name is selling one with the friedman mods for $500+ with some BS NOS tubes or something. Davis is selling a new piece at $350 if I'm not wrong. I think if you buy a new one and send it for the same mod, you will still have some money left to buy some nice tubes for it.
IMO the tubes that sound best with this amp are the JJs because they are darker sounding, but I would put a Tungsol 12AX7 in V1 just to get some clarity.
And go for the dual channel mod bro, there's a whole thread on all the mods on harmony central forum