Hallo and thanks. I find the return springs. I guess all the turning parts get a little bit stiff over time, so I greased all moving parts. It became better, but to improve the movement, I have to shorten or to exchange the springs. That's it. Thanks a lot. Heinz, Germany.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.