Thank You very much ladies and gentlemen.
I finally decided to go with the lighter blue decals. Edgar offered me to add a new decal sheet to my next order (need one or two motorcycles), but I want to finish this project in April (four months for a model is fast for me although Nigel and Joerg have finished their Nieuport long ago).
The 3D printed engine is a piece of art that falls together. The cylinders would fit without glue (which I used in very small amounts). It is all in all the best 1:32 scale engine that I have ever had in my hands.
And it is a biplane finally. The upper wing fit is excellent like everywhere on this kit. But with a Nieuport I never have had huge problems to fit the upper wing, even with the 1:72 Toko kit.
