Thanks for the info, Depending how stealth I have to be, I will give the 90 degress a try with the cards, and if I have to go A-B I'll run the sub-cards that I just ordered.
No prob. Here's one '007' (*wink, wink*) recording I did with the mics at 90 degrees (it says 'DIN' on the info but that's not quite true) about 7 cm apart (I'm estimating). Aside from the wind rumble, the quality of the recording is pretty good. Of course, it's an outdoor recording, which helps.
http://www.archive.org/details/llb2009-05-16.mk4.flac16And here's another 007 recording (of the same band) that is A-B, also about 7 cm apart, and done in a kind of shed-like venue (roof but no walls, on a slope). This is hardly a great comparison, with different venues, mics, etc., but it does give you perhaps a little sense of the difference.
http://www.archive.org/details/llb2008-08-12.km184.flac16And here's a 007 recording (of a different artist) that is also A-B and about 7cm apart but done at an outdoor festival also, so kind of a better comparison perhaps. It also sounds reasonably good, but lacks the 'full sounding' quality of the first recording.
http://www.archive.org/details/jj2008-08-09.km184.flac16