tv media to avoid

That arm is massive, it seems normal to me, but the plates are much too heavy !!!
So the media once unfolded, causing a huge lever to empty !!!
Once the tv (55 '20KG) to foot is the cold shower, everything is wrong !!! (Once the irreparable holes made gifts ... great)
And there's no adjustment to compensate !!! (Except tighten the screws like crazy to right a bit (but not right), and then we can no longer operate the TV.
However, a spirit level is provided and fixed on the plate.

So you have to fix the wall plate through to the tv in the end is right (not original?)
I wanted to remove an axis, but the parts are mutually incompatible, screws of different sizes, with different dimensions fixing lugs ...
I should have taken the fixed model.
I highly recommend this product.