Great job Donal,
You're definitely getting the process nailed down and the final result is excellent. Building the mosaic on the fly with quick screen captures is a great way to go. Interesting that you took Autostakkert out of the mix as in my experience that generally produces a better stack than Registax, so what was your thinking there?
At full resolution I can see one fairly long horizontal seam to the north of Mare Serenitatis heading towards Plato, i.e. towards the bottom of your image as you've presented it, so don't know if you had a small capture miss there, or whether it's a blending issue that you can fix. Other than that very minor blemish this is a superb image, very well done