I have this support for my BenQ ordered TH681. It all fits together beautifully. The holder makes a very stable impression and is supplied with a number of screws. These are necessary whichever thread the projector has.
The alignment can be wonderful to make in forms of any direction. Once tightened the screws remains the holder in any position - class!
Attached is a picture of the holder with the projector on the ceiling.
