what do you think about mounting the BT15 center mount to drywall using "wall anchors", the kind of screw that has a housing that spreads out behind the drywall, thus holding it from behind.... The anchors are damn solid.  My only worry is, would the 22lbs of the 5C bow out the drywall? There's a stud directly in the middle ...

Oops, I deleted my post, I'll try again. I'm trying to position my 522-LRs and on option is to mount them on the side walls, which are perpindicular to the couch/listening area but the speakers would have to be mounted a minimum of 3ft above the ears when a 6-ft person is seated (or about 6-7ft from the floor). This is because there is ...