At least some of the T-bracket holes align with the studs, the rest use plastic drywall screw plugs. The rubber bumpers do a great job of silencing the link - no rattles or any hint of instability. One of my QS8's is now mounted on the room door - suboptimal but that was the only place that was not too far behind or not too far front. The wire went inside the door so it is not visually too ugly. The door is of basic variety and regular screws seem to do the job - although I am definitely not trying to load test it or slam the door
