Thank you Gary,David and Andrew.
Was up till 1 am this morning try a few things.Changed the speed to.05,not much change,turned off DEC,no change.tried north only dec,about the same.
Tried south only and went from 1000 to 1200.seemed to be some sort of improvement.Only after 12 am,and the battery in camera going flat-(and so was the operator).Ther was a fair amount of smoke in sky-not sure if this is going to affect it.Also what exp speed for AG'er was using 2 sec.But 1 sec might be better?
So upping this calibration step,could be a good thing-try up to 1500-2000 tonight,and decfocus slightly as Andrew suggests.Thanks chaps-Chris