Ah, good to know. My understanding was that the AltAzMount driver has not been updated and the AltAzSimple driver is the way to go in Alt-Az mode. Will try the skywatcherAltAzMount instead...
The rfcomm device is a bluetooth dongle, which connects via the HC port in the mount. This has to be set to 9600 baud in order to work. The 115k is for direct connection via the USB port of the newer AZ-EQ mounts. I can use either way to connect.

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