I have a model 1 Saturn I use with SCART cables I bought over a year ago. The Cables are Composite Sync or C-Sync. However they don't work well with my model 2 Saturn. The issue on teh model 2 is the color is not correct and not uniform and much of the Screen is very dark. I have researched this some and for my issue I think gettign a SCART cable with Sync on Luma would fix this issue with my model 2. Since the first SCART cable I have works with my model 1 I haven't really gone and picked up another. However the model 2 my friend gave me is modded to play any discs region free or backups. So i should think about getting a cable for it.
I'm glad to hear that you figured out the isssue with your model 2.