I will observe the behaviour next time, but as i am only interested in visual observing, i can live with the feature. As i said before it is not periodic, as others have experienced, but random in my case,rather small (the 5 Seconds were assumed by visual comparison with the diameter of jupiter), and does not nerve me very much. The telescope as a whole does not shake, the planet wobbles a small amount up than down or vice versa. Before i go to deepsky imaging, i will move the OTA to a GEM anyway.

Best Regards
Wolfgang Graßmann,Germay