Thanks both @geehalel & @alacant.

I couldn't find AlignData.xml anywhere (searched for it on Terminal so it looked at the whole machine). Anyway, I just purged all the configurations, and tried again (dummy run indoors). The mount parks fine (pointing to celestial north), slews to a range of targets either side of the meridian & returns to park normally. But it still doesn't do the flipping meridian flip. Am uploading the log file from the dummy session (hopefully it will show whatever the mount driver is doing at initialisation).

The crazy thing is that if I set a target that's just the other side of the meridian (ie positive HA but still less than 0.10HA as a goto, the mount goes to it the "right way" (east pointing west) but if it had been tracking that object it wouldn't do that flip).

@alacant as you can see I came to the conclusion of trying from basics too (great minds ) but it's still no joy. I always bubble level before a session, & always park at the end of a session, & always polar align at the start (unless the mount has been left untouched from the night before).

@geehalel your last msg suggests that good operating practice would be to sync a mount model at the start of each session even if you've also done polar alignment, or am I misunderstanding that? (I had thought mount model tool was only needed if polar alignment was not possible?).

Anyway here is the latest log file from the dummy session - thank you again!

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