Dougs video's are great references
So based on his stereo mic techniques the one I am using currently, I guess you call spaced pair maybe 18" ? They are a pair of figure 8 Ribbons pointed at about the 12-14 Fret and just behind the bridge (The camera is actually angled a bit so the actual 90 degree straight pointing of the mic's on, is more to the right than in the photo)