Had the first clear night to attempt to calibrate SG-4. Focus with Baader/AP guidescope was achieved with no problem. Using two separate stars at the instructed distance from celestial equator, I tried multiple times to calibrate with "no movement detected". I have an AP Mach1. Rechecked all cabling secured including autoguider cable from camera to the AP control box. I could hear relays clicking in the camera. The guide rate was set to 1x in the AP hand controller. I verified that a quick button push at 1x would move the star on the chip in all 4 directions. I have images and log files if those would be helpful. I also tried to calibrate at the camera with no luck. The unit I received was missing a nose piece, so perhaps I received a returned item? Thanks for any help on this.