The brackets are made of very high quality, appropriate screws, washers and nuts, even for assembly were delivered to.
However, since I could not assemble without any restrictions on my TV, the holder, without that my Soundbar hovers more than 15 cm above the TV, I am afraid to pull off a star.
Have it solved so that I have the two brackets mounted overlapping on the tips, so I hang the Soundbar only 8 cm above the TV. Thus the distances match the screws, washers must be used.
If you have everything measured it 100 times, you can tighten the TV bracket carefully. Then everything should hold.
Anyway, I'm thrilled to now top of the bracket.