Very interesting article. I have been in several tom hidley rooms, including a non-environment' control room design. The walls were false. meaning there was a mesh wall and the real walls were back much further beyond the mesh. There was a 6 foot deep bass trap in the floor in front of the console and was also covered with mesh. The Control room was anechoic and was said to be the best for mixing according to Tom. You hear the sound once and no reflections from the room, true sound. It was weird environment to be in and takes getting used to, plus the bass trap in front of the console prevented a person from walking in front of the console, something I like to do now and then while mixing just to listen from different parts of the room. Hard to judge anything that was done there as I have never been in another control room like it to compare.