i just noticed this thread. recently i did install Auralex T-Fusors on my side walls. two years ago i installed RPG Skylines on my backwall. here are some posts from my system page which might be helpful on this subject;
i realize i likely need diffusion on the side walls and decide to try the T-Fusors;
decision
installation and my first impressions;
impressions
pictures unpainted;
unpainted
pictures painted;
painted
i realize i likely need diffusion on the side walls and decide to try the T-Fusors;
decision
installation and my first impressions;
impressions
pictures unpainted;
unpainted
pictures painted;
painted