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Guiding with a Go To dob would be an exercise in futility. You will be limited to very short exposures [due to the aforementioned field rotation]
that won't go very deep, and won't need guiding. You can easily manually take some exposures and stack them in Deep Sky Stacker. I reckon you'd be better off buying a premium eyepiece or two with the money. Were you aware of the limitations of field rotation before deciding to buy the Go To dob?
raymo
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