Used stud finder and found where the ceiling stud (joist) is, and start drill a pilot hole, once the drill bit go the drywall, it suddenly stop and I tried drill it further, and only get some small piece metal, which is eaten by the bit.
So I certainly be hesitate on continue, and I found another place (16" away) and drill thru it, it's the same, still get metal!
Any idea, BTW, it's a single family home, should be normal structure, I had successful install a wall mount for my LCD tv
And also, is it possible to just mount it into drywall with some strong anchor
The projector is pro8200 and with the mount it weight 13lbs