Thank you friends!
Well, first of all I've discovered a new photo of the left wing (under copyright; I cannot publish it here...) that shows a different pattern of the three-tone camo... So, I've corrected that; also painted some details and the "false" cockpit on the undersurface. That false cockpit was painted on the undersurface when the three tones camo was applied overall.
Next phase: painting of the tyres.