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I personally found it better to get automated focus happening and let SGP (And now Voyager) do it than manually focusing. Focusing by commanding focus moves and looking at the FWHM I found to be just less precise and often really time consuming, Using a mask was better on my SCT but that changes focus so quickly with temperature changes that it really had to be automated!
It should only take you about 20 minutes to get focus runs working in SGP if you read up on the setup process beforehand, I reckon on the SCT it saved me that much imaging time the first night I had it going.
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