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The GPS versions look after that bit for you.
From my time with a CPC925 GPS, the two things I would say are, take care to get the tripod base level (Get a small spirit level and ignore the built in one) and either use an eyepiece with a reticle or the highest power EP you have and take care to center the alignment stars really well. It is the difference in my experience between OK gotos and a gradual fall off in performance over the night and nicely centered targets and good tracking until you give up out of fatigue. The best night I got out of mine I was still getting accurate gotos at 3AM after aligning it as soon as enough stars were visible.
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