There is an easier way

First of all: a slatted same quality you can also get fitted for almost double the price.
The manufacturer's installation instructions are quite impractical. It took me about a half an hour with a different approach. What is needed is a hexagon (Allen) 4mm with long legs, the enclosed Allen is only for people who can also tighten the wheel nuts with your fingers. A magnifying glass would not be wrong to interpret the image in the assembly instructions correctly. Contrary to the manufacturer's instructions, I have drawn right down the cross bars on only one side. The other side was only loosely screwed, so that the second side member extending about 1.5 cm 2 of the cross members. Some cardboard in between, so that the beam does not always sliding down. The caps were previously mounted on both legs. I have slightly leaning on a non-slip surface at an angle to a wall the frame. After that, the female connectors are threaded through the middle and first down, and then put the top of the cap. A strip according to the other. When the hardness of the lower sliders is first placed, the bar then threaded through the middle chord, placed the upper slider and then slid into the caps. Please make sure that the middle chord does not twist. Then the upper longitudinal bar is tightened to the end. That was about it.