Putting aside the double boundary PZM fixture (which is interesting and I'll take up in another post), some of us guessed that a rig with an angle between that of our Parallel Boundary Rig and that of our Pseudo SASS rig (110 degrees) might be good to try because the parallel rig exaggerated the sides a tad too much in some people's opinion. (I happened to prefer the additional contrast). I was looking at your site and thought you might have had something similar in mind with this rig. Of course, the parallel rig has front-facing caps and the Pseudo SASS has flush-mounted caps. For those who want more center, I'm inclined to suggest front-facing caps on two boundaries tilted in on the leading edge a bit, maybe 10-15 degrees. Any thoughts about this suggestion? Rob D.