Our standard stacker works well for projectors weighing between 5 and 350 lbs. This low-profile mount offers rotation adjustments of 15 degrees (or 360-degree rotation when used with national tapered pipe), +/- 6 degrees tilt and +/- 3 degrees roll with positive locking of set angles. All PBMs can be secured to a single wood stud, mated to our false-ceiling adapter, our adjustable suspension adapters or standard 1-1/2" pipe. No modification of the projector is required to install the mount.