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Jase,
Thanks very much for your input. I can see what you mean with the SCT and how movements such as mirror flop could adversley affect the PAC. I'm keen to try it out again and see how I go, to be honest I haven't had the opportunity to use the setup since my last encounter which prompted this thread, so I haven't tried any of the suggestions here yet. I'm hoping to this week, Saturday at the latest.
It was only the last time that I used the scope which I started to think "hmm, i wonder what those numbers actually mean, perhaps I should be looking at them". They were huge some times (I remember seeing numbers like 300!) but can't remember what measurement they were in. It also sounds like I need to be more careful with the PAC - I typically have just put my 22mm Panoptic in the Megrez 80 (480mm focal length) and centered the star using that. I've done this because it's easy to find the star and center it. I am usually too lazy to put the illuminated crosshair eyepiece in. I think that's just not good enough and I should now definitely use the 9mm illuminated eyepiece, perhaps even with the doubler. Using the 22mm is just too lazy on my part. Your reply has made me realise that.
One thing that I still find a little confusing is that I can more often than not achieve a pointing model which results in every GoTo being dead on accurate. I'm very very impressed with it's modelling capabilities in that respect. Yet at the same time, the tracking will be way off - completely un-usable for guiding.
Roger.
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