I have a ZWO ASI2600MC Air controlling a Celestron AVX mount that worked / tracked fine before the latest firmware update. It will no longer polar align or track accurately after the latest firmware update. Errors experienced, during PA when the mount is rotating 60 degrees after the first plate solve, the mount will slow / almost stop, then resume rotating. Once the mount finishes rotating for the 2nd plate solve, the ASI2600MC Air states the mount stopped rotating and errors out. It requires me to perform the PA again, but it always errors out and I can't PA any longer. Additionally, the ASI2600MC Air will not rotate the mount to view objects (i.e. M31 Orion) in the Southern direction. ZWO needs to fix the firmware change that broke the ASI2600MC Air ability to control an AVX mount.