Since I had to put my beamer now deeper, the second piece of good support is no longer out of the question. I bought the Cheetah Mounts. All adapters are screwed together and are very solid. Since nothing wobbles - I believe even a small elephant could without problems on the thing rocking.
The holder is really universel. Directly under the ceiling or 30- 40 (50) cm deep - anything is possible - and extremely stable. And that part looks real even much better than in the Prdoduktbeschreibung.
Because thing here costs around 20 euros. And it would have 100 euros would cost my review not have been different.