The product is good, the assembly instructions but so what of bad ... The Monatgeanleitung not correspond to the product, for mounting I experiment with a lot and three people who have also tried with cheerful, needed almost two hours! Better assembly instructions would help the product to 5 stars, but so, only 2 stars!
If anyone has a problem with that, go to the holder, here's the solution. The crossbar between the supports, open the holder, so that one comes to the attachment. The dismantling of the drawn center bolt, one should make in no case!