Ok, I want to add this. Tape measures and the like are nothing more than a tool to help you get a decent approximation of speaker placement. The thing about MS is that it's the antithesis of this. It's entirely 100% arbritrary. There are of course a few ground rules, closer placement to the wall, deep soundstage is an illusion of the eye (which I couldn't disagree with more), and quite to the contrary to what Lou and a few others are saying, sweetspot centric. I did not see Rod sit in any other seat other than the sweet spot the entire time he was setting up the MS in Lou's room, which to me says that what he was focused on was sweet spot only. Maybe there's some benifit off axis, but if there was Rod certainly did not appear to be focused on that at all. By the time he was done I was not impressed with the results in either voicing or soundstage/imaging.
It just sounded wrong which is why I pulled out the tape measure to begin with. Not that I think that measurements are the end all be all, but because I wanted to get an idea why the soundstage felt like it was pulling to the right... Maybe because of the speaker placement, maybe because of the faulty amps, maybe for some other reason.
Fast forward to Saturday and Sunday when the Daedalus room sounded great. I still was unimpressed with the soundstage and imaging. The previous year setup was probably the best I heard at the show regarding imaging and soundstaging... Simply awesome. This year once the modwright amps were in it was all about tonality being the rooms best attribute.
Now, Emmanuals room in which the Ulysses were pulled out from the wall quite a bit, were relatively symmetric and well balanaced tonally (even better than 1030) did not utilize MS (at least I doubt it as the speakers were pulled into the room a lot more than 1030, but I might be wrong) Any way it was night and day! Best soundstaging, best imaging, best tonality, best bass, best over all sound IN THE SHOW. It was quite breath taking. I felt the soundstage depth go way deeper than room 1030, I noticed an ease of presentation with female vocals as opposed to a tendency to nasality with 1030 even with the Modwright amps. I attribute this to either the room, or the MS setup because that setup was almost identical last year and it did not have this as an issue. Plus in room 804 (1st music) it didn't matter where you sat, it always sounded flat out gorgeous. Room 1030 there were a few "B" seats in the house that were rather bass heavy or tonally off IMO.
Again, I am not a rock hard measurements guy. I agree with Lou in the sense that you can't setup a pair of speakers to have great sound in the sweet spot or otherwise using a tape measure, but I also think it's just as silly to be on the opposite end of the spectrum and do things based solely on tiny changes done from one listening position.
Please don't beat me Lou.