Thanks one and all.
Tip- In order to try and get the best out of things (processing wise) I have been guiding the exposures. I think it makes the stacking process much smoother. My mount is pretty well alined but I firmly believe this is helping. And of course if you do field trips it is a must!!!
I use Mire de Collimation Ver 3.0 It is free of the web and will over lay any capture program you might have.
You probably think Im mad
but try it and see.