So I shared my 670 beasty crushing and misbehaving on another forum for those of them who have never heard a 670 style thing really squeezing a neck, I mean audio. 30 tubes at your service, custom transformers wound by yours truly. Only one in the world and she is over 16yrs old never had a hiccup! I get annoyed at the point and click experts who can tell which plugin sounds more like a real vari mu. Some vari mu don't even sound good to me. But that's just me, lol.