The tilt and swivel is very well done and allows the projector to align precisely. Even in the attic should work!
Tip: The smallest screws in the set are M4, the Acer H6510BD but M3 thread's for little money at the hardware store! Also recommended spacers so that the projector does not depend directly on the bracket and air to breathe has. I have also used rubber sleeves from the hardware store. The dowels are not suitable for plasterboard I recommend plasterboard dowels hardware store!