Construction: Well. IKEA works because in my opinion more precisely. But with a bit of fiddling I managed to find the Schraublöscher. The holes in the leather and upholstery were displaced. The roles have, in my opinion this does not deserve the name, they've soon exchanged the roles of the 10 year old predecessor.
After that I was initially quite excited.
But after a few weeks and crunches knaxt it with every movement. The upholstery is now so compressed that I barely notice them something.
Anyway, I'll be sure to keep the chair less than 10 years.