Hmm, so your problem really is understanding what tracking mode the mount is in.
You can do a drift alignment with a GoTo no problem providing it's tracking at Siderial, I used to do it all the time with my LX200 until I learned better. Now I do it by hopping between 2 stars using the GoTo and adjusting the mount appropriately:
http://www.rogergroom.com/rogergroom...m.jsp?Item=343
Using that method I can currently take a 30 minute exposure with no declination drift at all (2160mm focal length). That's better than I ever got with drift alignment.
But that would still require that your mount isn't correcting for known polar alignment error, so it still comes down to knowing what tracking mode it's in.
Hopefully someone with CG5 knowledge will be able to help. With my LX200 it doesn't have anything other than Siderial and with my GM-8 I make sure it's on Siderial not Adaptive King or anything else. Presumably the CG5 would have a menu option somewhere for choosing, but I haven't any idea.
Roger.