Here some pictures of the sluice and the rack using a small waterfall as water supply.

The rack has two different settings for the legs: high (left side) and low (right side). You can switch between them by turning the legs around 180 degree. In addition to that, every leg is adjustable in perpendicular direction (around 15cm each!).
Here you can see how long the rack is (and this is not even maximum lenght!).
Side view. The adjustment of the system's hight is very easy to be done. Also the left to right adjustment (setting the sluice in a horizontal position) is very easy, too. But the big thing is, that in carrying position, the rack fits inside the sluice and therefore is very easy to carry (of course, it is very lightweighted an very handy!)...