I've had a opportunity to breifly demo a one of kind train wreck clone built by SDG Vintage Amplifiers. The build quality seems superb. SDG appears to be a respected builder here based on some the search threads I have read. The touch dynamics of the amp seem pretty special. It's extremly loud and I've had to attenuate it to hear the the goods. I have a few attenutors and Ultimate seems to let the amp shine. Here's where I am confused. Is the Constellation a Train Wrech inspired amp? I have not A/B this amp with my Constellation but my intial thoughts are that the Constellation (with both channels blended) and the SDG Train Wreck clone have similar tones. I don't know anything about the orginal Train Wrecks other than they were designed by Ken Fisher and seem to be some type of modded Fender. I have never had the opportunity to see or hear one before. My only education about the amp is what I have read on threads here. The vendor has been kind enough to let me demo it for a couple of days. I am guilty of buying differnt amps only to find out later that I aready had that ground covered. Any help is appreciated to try an protect me from myself.