I have a CGX (5 years now). You may want to consider changing your old school ways if upgrading. Celestron have a software control app developed by Plane Wave, which provides a range of mount control functions, including an excellent multipoint sky modelling tool. Connectivity is provided by a dedicated USB port on the mount, which bypasses the EQ controller. You can still use the USB connection through the hand controller but the functionality is better through the CPWI software and the mount USB port.
You might get alot of help on the Cloudy Nights Mount forum section, as there are many CGX users there. Also Celestron Tech Support.
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