I've begun to place the decals. And here, I had a bad surprise...
That was not visible on the decal sheet, but the roundels of the fuselage had a little partial border of white. More than that, the white of all the roundels was not completely opaque; it is as if there was a problem when produced.
As I have a good reserve of WWI decals (a gift of Philippe jourdan), I searched in my stock for Americal Gryphon RAF cockades; but I discovered... A complete decal sheet of the first release of the DH2 Profipack! So Philippe, thank you! Thank you! Thank you!!!
So, I have replaced the decals (I had to replace also the cockades of the wings, because a little difference in the blue color of the two decal sheets) and here is the actual situation...