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For the sake of completeness and to help others who search for this in the future, I'd like to finish off my discussion earlier on my problems of night-to-night sync location/pointing.
I've found that my problem was my scripting. It turns out that during the night my scripts were causing the Paramount to flip sides of the meridian (unexpectedly) and when doing so perform a plate solve and synchronization (unexpectedly). Once this sync was done, the TPoint model was polluted and pointing off for consecutive nights (at best) or the plate solve was incorrect and pointing was off even more than just pollution of the model (at worst).
So, now that I have ensured there's no errant plate solves and synchronizing due to my scripst, I'm finding my pointing between nights is repeatedly within about 10 pixels (about 8 arc seconds) of the previous night. Very happy to finally sort this out so I can do more productive work with the mount.
My scripting is done using CCDCommander but it's not it's fault, it's simply my choice of settings in it, having come from a LX200 which didn't concern its self with meridian flips.
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