Some guy on the PE forum figured it out, I think. Its probably somebody I talked to since s/he seems to be be commenting on my flange cutting technique with the neo's (though there's some guy in Calfornia who developed a system of tubes almost identical to mine totally independently). Anyway, it looks like Pete and Bill, are hyped up on using ribbon-planars because they are unwilling to go to a 3-way system, and are limiting themselves to the design limitations of a 2-way design.If one does that, then one gets comb filtering unless one uses ribbons.
Marolboro