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With the Takahashi EM-200 I get, according to TPoint, an all sky RMS pointing of about 20". That is after a 100 or more point Automapper II run.
Once it is aligned to within about 15" of the pole with a sigma of about 10", I will get a periodic error of about 5" which fits with what the manufacturer advertises. There is no drift.
I am sorry I can't give you a drift answer in the format you requested.
In all with TPoint I am pretty happy with the results.
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