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G'Day Matt,
I got my GPS module from AstronomyOnline for $680 I think (from memory!). It draws it's power from the scope drive, no separate power supply required.
The standard auto align procedure is fine. Stick with that to start with. In the southern hemisphere (i.e. for us!) it will pick two stars in the eastern hemisphere and one in the west, than calculate cone angle errors etc.
If it picks a star that you can't see, just press the Undo button, and it'll go to the next one, etc until it gets the stars it needs. If it picks a star that you aren't sure about, you can "undo" that as well if you like. Once you get into it, it's pretty straight forward, it will lead you through.
Al.
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