Hhhmm, interesting. I'll do some recordings and try that approach out. I'll mess around with it. I'm not sure if I agree with the idea of attenuating the low frequencies/fundamentals, but I suppose I won't know until I try! Now I'm curious though.
If it's not clear, I don't do a lot of heavy guitar recording! I mostly deal with instruments in the recording studio that don't plug in!
EDIT: I'm just not thinking well tonight.