I will only speak with some confidence about one D I service: They use 2 AKG 414's taped to the underside of the lid. They're not side by side, and I couldn't tell you exactly where they're placed. I have heard recordings using this technique, and I told the sound engineer that I thought the sound could be a little 'fuller, more round'. This was a few years ago now. He agreed and has been working with minute changes in placement, but I haven't heard any recordings recently. 414's are pretty much industry standard as far as microphones and pianos. As far as 'road' pianos..I won't go there! -Phil Bondi(Fl)
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