I remember seeing the original article and the one that preceeded it that Tom referenced (4 custom setups tested) in S&V and remeber being impressed with the results.
Looking at his setup now (relative to the current guidelines on this site), he did not have an "optimal" IB design, but got impressive results nonetheless. I remember your mentioning the "timing issues" due to the distance between the top and bottom drivers in the past.
I am taking sound mesurements right now for my IB, and so far, the best location in my new home would require a somewhat less than optimal design of the manifold since one side of it is against the basement wall.
This article showing up again, and the fact that the "12 dancing Shivas (with new drivers) setup is still operational gives me some comfort that possibly having to stack the drivers 2 high per side will not be a major problem.
Could you explain why you didn't go for a two-driver-wide manifold rather than your much taller single-driver-width column? At a glance you seem to have lots of room around the manifiold area. Perhaps I missed the explanation?
In the rather brief email exchange had with TN, he seemed to express reservations regarding the slant the S&V editors chose to give to the article. So my guess is he's real focus wasn't obtaining a couple extra dB of output...
I imagine John Salvini's IB (containing 8 Ave 18"s) has the ability to go louder than Nousaine's.. It's a moot point given all the glass in John's room, and the fact that he's a little past the age where people are interested in dB drag racing...