Mark,
Are the mids/highs dipole? Kinda looks like it from the picture but can't quite tell. They do indeed look very cool. I think I have bought my last commercial made speaker. I have gotten the DIY bug now.
I am actually just taking a break from routing my speaker stands that I am building for my Maggies. They are slightly more complicated than I first anticipated but no worries, just will take a bit of time. My wife came up with the idea and I think it is pretty cool, not of the ordinary.
Cheers and keep us posted.
Josh