Hi,
this is my first post and i hope i can help you out on this one.
I did a production two weeks ago and i had to mic an acoustic guitar. So here is a picture of what i have done.
I used a Neumann TLM103 30cm away from the soundhole and a AKG C414 30cm away pointing on the 12th fret.
I didnt pan this hard l/r, i only mixed and routed the signals. TLM103 at 0db and the C414 at -10db. Got a beautiful sound out of it.