Thanks for your suggestions Giorgio. I have been running Astroberry in server mode with Kstars client on my PC for several months and I agree with all your comments, it works well. I have one remaining problem with the internal guider and a small amount of drift in RA resulting in egg shaped star images in some frames. That could be due to my rig, incorrect configuration of the guiding module for EQ8-Pro mount or simply poor seeing.
I have installed StellarMate for better support and will be using it in thin client VNC mode first (when I get a clear night!) to see if guiding is any better. If it isn't then I will revert back to heavy client - server mode and look elsewhere to fix the problem. My theory is when operating in heavy client - server mode maybe the guiding response is delayed because the guide camera image has to be transferred to my PC across the LAN, then correction pulses sent back to the indi server across the LAN for transfer to the mount. With thin client maybe its faster as LAN is not involved. Anyway I expect to be proved wrong and guiding drift in RA isn't due to operating as a heavy client.
Thanks for the link to to the manual.

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