Roger Wilco hey Roger, before the update, did you have good guiding? I seem to have the same problem. Brand new AM5N with ASI2600MC AIR. I had 9 nights of great performance from the mount, with different sky conditions, freezing temperatures, warmer temperatures, wind and it performed great. The day I succumbed to ASIAIR update, I started getting BIG RA JUMPS so often that I threw away all of my subs that night. Since then I have more than 40 hours of trouble shooting but nothing has worked. 10 to 15 min after the first guiding calibration of the night, I start to to get high frequency vibrations that look like bad seeing in the magnified view of the main guide star, that slowly get amplified in the RA so the star becomes oblong in every frame (even in 0.5 sec subs) and then this amplifies into getting double star images in some of the frames. That's when the RA jumps start and persist throughout the night. I have the feeling that most of them happen around the time when asiair completes an exposure, starts downloading the image etc. Reading your comment makes me think ASIAIR issues and not AM5N issues. ZWO support is not doing much.....
