How things have come full circle! When I was using tube amps in the Sixties and Seventies, I couldn't get rid of the distortions. In fact no one could. Some, like Lemmy, embraced the distortion while others, me included, tried their very best to overcome it. I designed and built 50, 100 and 150 watt tube amps but was not happy until I left them all behind. I still like designing with tubes but leave the heavy lifting to SS circuitry. Tubes for the pre-amp evey time.