Conclusion .... am thrilled - Easier than ever.

Have retrofitted with the bidet attachment today two of our three toilets. Expenses per toilet - about 10 minutes.
The set is endless, neither in terms of completeness, accuracy of fit and workmanship.
Is delivered in a handy box including carrying handle. In it you will find the essay, a tee, a about 1.20 long plastic high-pressure hose (very solid, have no worry about bursting or material weakness) and a 50 cm long metal high-pressure hose - just for the normal connection between angle valve and cistern. Who does not need to, will miss a rubber seal, which would insert into the open side of the tee. I have a T-piece with a rubber seal screwed directly to the inlet of the cistern - and the previous tubing set to the other end of the tee - perfect. (You could also take the rubber seal the enclosed high-pressure hose, would also fit .....) The installation material is extra packed in a separate bag, including sufficient illustrated instructions, the essay itself is found in a bubble wrap. From the quality of the whole, I was thrilled to be much better and more massive than the photos suggest it here. The rotary handle operating clean and can be controlled finely, with slight detents. The extension end nozzle sprayed at the right angle, a water jet is just right on the hardness ago.
The installation is quick and safe, easy to connect to the plastic high pressure hose tee and cap, insert the whole under his glasses, push in the desired location and glasses back screw - height problems were here with me nicht..Der essay can sicvh Set by a kind of sliding block any spectacles. When adjusting before screwing the situation again check (Nozzle times with hand off if they can move freely, was supposed to operate as close to the rear edge of the ceramic ...) - That's it.
In summary, for the price an ingenious solution without changes to the existing installation - and again - qualitatively significantly better than expected. Nothing wobbles because nothing squeaks and there is nothing too heavy. Any time. Hot water I do not miss also, would also not really make sense, because until the warm water mattered, you would have done as a rule anyway with the cleaning ... :)