David, I'm sure that many conditions that cannot be held constant in listening rooms affect the sound we get as much as do tweaks. Certainly my experiences differ from yours as I have constantly found alternative room treatments badly interact with each other.
This was true of the Roomlens and the RPG diffusors, the Shatki Halograph diffusors and the Syn. Res. ARTs, and the Shun Mook Mpingo disks and everything else.
This was true of the Roomlens and the RPG diffusors, the Shatki Halograph diffusors and the Syn. Res. ARTs, and the Shun Mook Mpingo disks and everything else.