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A couple of clarifying questions.
How quickly is "drifts away quite quickly"?
What FL eyepiece and FL of the scope?
How long does it take a star to go from one side of the eyepiece to the other?
Do you have your scope on a wedge and in polar mode or not on a wedge and in basic Alt/Az mode?
Have you checked to see that you are in sidereal tracking rate and not terrestrial or luna?
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