The Slider is supplied with screws and everything needed. The instructions for the assembly is illustrated and leaves no questions unanswered. Apart from the fact that the seat of course is slightly heavier and the assembly is thereby connected with some effort, screwing the rails succeed relatively easily. The seat must be unscrewed from its pedestal to be placed on the "back" and then re-installed correctly. The lever with which the Arritierung fires must be clicked under tension pretty much in the holder. There is much force necessary to press the lever to / bend together and I had "sleeve" me very doll to pinch your fingers. It went well and the fingers are still there. The seat can be adjusted with the slider about 20 cm forward. Now the seat can be used by smaller people without adjusting the length of the base frame to adjust. Since I operate the seat with the monitor arm to me has become too complex and cumbersome that. The purchase is highly recommended in my opinion. Breakfast well before assembly and be careful when click in the bracket.