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The blue dot on my F1 Ultra starts to bounces front to back. When it finally stops the blue dot is not centered as it used to be when I first starting using. The blue dot is more to the back of the black 5x5 card used for adjustments. Please see video I have included.  I need an answer VERY QUICK BECAUSE I'M WORKING ON A MARRIAGE ANNOUNCEMENTS METAL CARD!!!!!!!! PLEASE - PLEASE - PLEASE