Now, after three weeks gestation and an average approach of about 7 Sec. a day I am completely satisfied, even the hardest impacts when flying coped the clock without any problems, there were also no scratches in the glass and on the stainless steel strip. Should shorten the only downer to go to the watchmaker, the screw was so strong that not even two screwdrivers 1.4 mm sufficient to solve this.