Hi Daniele,
Thank you for sharing this great picture! For 127mm aperture this is very good, indeed.
Your workflow is interesting. What do you mean with "DIY script"`to correct for field rotation? What does DIY stand for? Anyway, good to know that you found a solution to the field rotation problem.
All the best,
Rolf
DIY is "Do It Yourself". People who make things themselves or perform certain kinds of repairs or upgrades are DIY'ers. A person who replaced the sink in their bathroom instead of hiring a professional is a DIY'er.
I would also be interested in learning about the field rotation script.