Thank you Efrain, Rick, Paul and Tim for your advice and kind words. I was trying to re-align with the generated dark frame so I will skip that. When the new camera comes I will take the multiple dark approach.

Yes New Zealand is renowned for fickle weather and while we are happily much drier here, I am afraid the blurryness in my shot can't be blamed on the skys. Its hard to get a really tight focus on what you can't see in the camera.

Clear skys to you all.

Kind regards
Matt