@tech@zwo#48880
never thought about SkySafari, I use it in my workflow for easy positioning without typing star names or ngc numbers. Last night I tried without connecting SkySafari to my CEM70, only using Asiair for positioning. It worked, calibration worked at first try, no backlash problem or calibration error!
Although it was only one session, it seems that your idea that the described calibration issue is a SkySafari/Asiair issue might be right. (Used SkySafari also with my AVX, where error sometimes occurred)
I will have a further look next nights, interesting trace….