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I have a Nexstar 8SE with a Starsense. Unless you remove the Starsense you only need to do the calibration once and you do it through the eyepiece at high power. I would go with the cheapest possible option if you are convinced you need to replace the Celestron finder. I used a cheap red dot finder and now the Nexstar puts objects in the field using an LVW 17mm eyepiece and I have not tweaked the backlash yet.
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