After I gave up after about 30 minutes (and several oblique forms), I took
finally the manual at hand - and lo and behold! After only 7 minutes the ball was finished!
An absolute 1+ with * are available for the material! Despite high "stress" is everything
Formstabiel and above all remained!
The assembly works alone very well, because you "wedged" the ends together. The giant screen has even survived the fall when hanging without prejudice!
A real eye-catcher is the lamp of course.