Ah, that's interesting. How far is the warehouse from your home? When do you listen to music? I am guessing, if it is a bit away, then you really have to plan your listening sessions.

Please do post new pics when you get the diffusers. I have seen pics of systems in a barn on the property. But this is something different. The big advantage you have is the BIG space itself. I am sure you have a cavernous (in a good way, of depth) sound-stage.