This young man (or old man, or middle-age man, whatever)... Obviously KNOWS his stuff! Really! And in my experience, if you were to pick an amp tech's brain he or she would charge up the wazzoonie, and rightfully so, for the kind of info and advice he dispels freely. So- after reading many a thread, as well as having some of my own tube-related ?'s addressed by PBG- (I LOVE my tubes- V4BH, Mesa Buster-count 'em- (10 6L6GC's total!!) THANK YOU, SIR- You re an asset to TalkBass!