I think if you tweak it to get symmetrical you will still overdrive the stage anyway. And it won't sound any better if it's clipping evenly on both sides rather than just one. It's not really meant for that kind of guitar signal.
Some tubes amp do that as well, the gain stage before the volume control clips unless you turn down the guitar volume. Just that with tubes no one really minds as much because the clipping is softer.
You can tweak the gain of the stage to deal with it, but you might just find the next stage or somewhere down the line clips the same way.
That's why I suggested getting full unclipped output and seeing what kind of input signal level that requires.
Some tubes amp do that as well, the gain stage before the volume control clips unless you turn down the guitar volume. Just that with tubes no one really minds as much because the clipping is softer.
You can tweak the gain of the stage to deal with it, but you might just find the next stage or somewhere down the line clips the same way.
That's why I suggested getting full unclipped output and seeing what kind of input signal level that requires.