I use it with my th681 Beamer. The projector has only 3 mounting holes, which I have super achieved with the ceiling mount purchased.
The projector can be tilted to the ceiling mount in almost all directions, so you can adjust the projection angle with millimeter precision.
The enclosed dowels and screws for ceiling mounting are quite large, that the holder will remain well in an earthquake in place (since the projector is directly above the bed, which is not so bad).
