OK, so technically a tube running in class A is biased so that it never reaches cutoff when the grid swings negative. With guitar amps, when you're overdriving them, you'd have to bias it really hot to get it to never swing that negative, but lets assume that you do (and set the signal amplitude to match). Doesn't that mean that the more positive swing of the grid is going to cause the tube to reach saturation very early? Meaning that you're going to have minimal clean overhead and a very asymmetrical clipping (which emphasized even-ordered, low order harmonics, right)? Is anyone actually biasing amps this way (see previous discussions about how even single ended amps-class A by definition-reach cutoff)?