Rockhound sold me another Peach, and I replaced the 12AX7 tubes with Telefunkens. My Khorns and I love the change! Thanks to davis419b sending me an email from Mark Deneen, I just ordered a quad of them for the pCATS. I was going to replace the KT88s, but Mark wrote that the improvement was to be had in the drivers, so I'm looking forward to getting a quad of Telefunken smooth plate 12AX7s from Brent Jesse to go in the pCATS. Don is also sending me a copy of the pCAT manual. Thanks, Don; mine is buried in a pile somewhere.