It could be that a manual slew would *not* work (although in principle the software *should* overcome this by not using the user rotation value for anything other than a mount command and then figuring out the "real" rotation by plate solve). If the SW isn't already doing this, your manual slew could be part of the problem. Again, although slower, I'd recommend a careful baseline PHD2 drift align (once), followed by another set of Ekos PA runs (back-to-back) to compare both precision and variability. In case it's not obvious, *don't* change the Alt or Az mount knobs after the PHD2 align for any of the Ekos repetitions! Then report your findings. Good luck and CS, Doug

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