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Gday Stu
I just used CdC to show where contact is "relative to a horizon view".
Ie for Melbourne, pretty much the bottom of the sun when altaz.
Once i centre the sun, i use the slew keys to move the tube
"down" to match where the plot shows it to enter.
Look through the EP as you do this and the visible edge of the sun in the EP is the entry point.
Andrew
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