I imagine I will be ceiling mounting all four of my QS8s when I move my system to the basement, but I still think it would be slick to have a mounting system for the wall that can slide a speaker both horizontally and vertically in the range of at least several square feet. Just like my loudspeaker lazy susan idea which would be remote-controlled rotating platforms for your main speakers to sit on so you could easily experiment with toe-in, the sliding speaker mount would likewise be for the more dedicated hobbyists who want to experiment with the positioning of the surround channels. I have the feeling I would have to get these custom made, but on the off-chance, has anyone seen anything like this? If not, does anyone know anyone who could make something like this well?