I bought 5 170s a year ago. I recently rearranged the things in my living room and having a hard time wall-mounting the 170s. The right side of my listening position opens to the dining area (no place to mount the RS on the side wall). My listening position is up against the rear wall. I am planning to mount them on the rear wall, but facing each other. Ceiling mount is not an option. I thought of building a shelf (12"x12") with a single shelf bracket, but I don't know how sturdy it would be. Any suggestions?

Thanks!