Mike,
It's been some years ago, but I did have the pleasure to see/hear your system. I went with a bunch from Portland. I see that your system has changed and it would be a great experience to do it again sometime.
As to the sound diffusors you built recently (with excellent results), might you have photos, or detailed instructions to share?
I've often felt the need to explore this inexpensive tweak.
Thanks and happy listening,
Oregon