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Paul,
I think you'll find that error is in the order of 12-14 arc minutes not 12 arc seconds.
Was your target SAO132331 or SAO132320 ?
If it was the latter then the pointing error is more in the order of 15-16 arc minutes, so I am not sure how you derived the 12" number.
The P-ME should get you sub 10 arc second pointing accuracy with only a 10 or 20 point model no trouble.
It won't make any difference what the focal length of the OTA is, the pointing accuracy will still be the same since that is mount dependent, however longer focal lengths are more often mirrors, so you'll have more OTA movement to contend with.
Are you sure your time is accurate between sessions or you didnt forget to resync the mount, or Polar Alignment is way out because that sort of error is way outside the normal mechanical limits of a P-ME ?
Rally
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