Strangely I have had issues about this too (such is the joy in my life) whilst trying to mic up acoustic close and far as well as use the pickup to do a multi track in one take. Couldn't get it to work properly.
Admittedly not trying to get a stereo feel, just recording multiple tracks with which to mix. Couldn't get something about the phase right. In the end i took the view of @Dad3353 and thought, why bother? I just played twice and recorded separate tracks for each mic which worked much better.