I mentioned a while back that I had commissioned this amp, and the builder called Thursday to let me know he had finished it. Fortunately, he lives in the same city, so a 20 minute drive and I was in his shop demoing the amp and finding out all it can do. It is very complex and might take quite the learning curve for an old guy like me, but the tones coming out of this thing are glorious! EL34 50 watt combo with a Weber Michigan Alnico speaker. 2 button footswitch for gain and boost, a triode switch for a little quieter setting, and several other switches for bass boost and bright. Mark Kane's work is stunning. He builds these Dumble clones as well as Trainwrecks, almost 800 of the TW so far, and several hundred D clones. I'm very pleased so far.