The projector is mounted as in almost every other bracket with 3 screws to the 3 arms. Short still centered the projector from the focus ago and screwed.
Well, we come to the biggest problems:
Just about the bird principle was stolen, it was not properly implemented. The connecting pipe can not be flush mounted to the lower portion. This shakes the whole projector and can not be adjusted. Even if the projector would not wobble as the adjusting screw after installation no longer accessible.
Coincidentally, it comes with me very closely with the picture, but you should at the Beamer also nothing to be adjusted.
I have attached a pic where you can see how inaccurate the connecting pipe looks after assembly. Not very stable :-(