@Tech@ZWO#59031 Guiding will work fine for some time and then for no apparent reason either Dec or RA will go crazy. I then have to recalibrate to get it to settle down again. There seems to be no reason for this. It doesn't happen with PHD2. No point to ask me for logs as I have stopped using the asiair. As I said, I will not go back to it until I see a big improvement. I am quite happy with NINA and PHD2. These softwares give far superior results, especially the autofocus.