For what it's worth, hard 'stereo' panning of guitars has gently passed away. The problem is that when you do this, your listeners see your guitar as a massive instrument sitting between their speakers, and quite unreal in headphones as your head kind of zooms into the place the microphone was, and that was not a great place to listen to a guitar. The thinking is that as the sound hole tone and the finger hard tone are so different, then when you sit in front of a guitar you don't really hear an instrument with width - a piano, or harp, or marimba, that kind of beast does have width, so the various stereo techniques work quite well. With acoustic guitars the two different tones from the two mic positions get blended together to sound real, but the width restricted so pan is quite gentle. Since the 70s, commercial stereo recording have gradually got more realistic of what you hear for real if you were in the room. I think the classic is two voices where the hard left singer one and hard right singer two has never been the norm, but for some reason, guitars got special treatment, with boomy left and scratchy right.