After initial testing for well found with a guide would be very helpful.

The only real problem is that no guidance is doing but I can confirm that the pump for all common ventiele [...] works. you just have the upper cap screw (the lever open before) and there is then a rubber ring and a plastic part in it what you whichever has one valve, must adjust. At the beginning a little trial and error and trial and error but if you understand the system first then that's great.

So again here, too, a manual might be quite nice and not cost the earth, rather Manufacturer)
Or maybe a hint and the dealer by plus points to earn. Just make a few black and white images and to one sheet with few explanatory sentences copy and the product is the 5 star has earned loosely.