A little shot of Naggy on the water: View: https://youtu.be/M2KVK31Nssc she turns pretty good? Yes? It was a Hoot running her around!
I would say the Gold standard for Nagato turning is Jeff's Mutsu. I suggest you discuss it with him to see how you can improve it. You are turning better than some but there is room for improvement. Looks like a great build so far.