I honestly can't tell how, the red cross sits in the corragations, from that photo. Your photo in the aircraft forum was much closer up, blown up. I'm guessing it looks alright close up.
Thanks for posting that in any case.
I will cut the letters from the decal sheet so I'm really only worried about the larger area crosses, which I will also trim close before trying to apply.
The corragations on the side of the fuselage are deeper than those on the end of wings as well.