Mic placement for acoustic guitar/vocals ?

All - I am tracking vocals and acoustic guitar simultaneously for a project. I was using an AKG C3000B for the vocal 7-10 inches from the vocalist, as well as an AKG C1000S 3-4 inches from the vocalist. Then an AKG C1000S on the acoustic at the 12th fret at a 45 degree angle. For the most part I have been pleased with this arrangement, however, the C3000 is doing a fine job for the vocal on its own. So I was wanting to incorporate the extra C1000 on the acoustic to "fatten" up the tone a bit. I would like to continue using one at the 12th fret. Does anyone have any suggestions as to placement of the 2nd C1000 ? In regards to where else on the acoustic could I mic in addition to the 12th fret ? Any suggestions would be greatly appreciated ! I'm trying to get a "FAT", organic, acoustic and singer on a stool, "live-ish" sound. Let the suggestions roll. . . . . . .

Tip: The Digi 1-band EQ has a phase reverse button on it and uses very little CPU. I use it all the time for the bottom snare mic just set flat.

I've had great success using a second mice behind the right side of the player about 2 feet from the guitar back. Some warm overtones from both the singer and guitar body.

I got a very warm 12-string guitar sound once with a pair of SM57s, one near the soundhole and the other about five feet overhead. But the musician wasn't singing...