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To be honest having a GOTO accuracy of 15' - about half the width of the moon, is pretty typical of what I have experienced over the 10 years or so that I have had my 8SE. If you have not done so already you could try tweaking the backlash settings, running the CALIBRATE GO TO routine at the start of the evening can also help. Another thing to try would be working out whether your scope is front or back heavy and selecting either the UP or DOWN arrow for the final GOTO approach. I also have found that doing an initial 2 star alignment and then replacing one of the alignment stars can sometimes help (no idea why this should be so). Also don't forget that there is a PRECISE GO TO routine buried in the menu tree somewhere. The Nexstar Resource site run by Mike Swanson is well worth a look.
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