the rear fuselage has panel lines as you can see in this kit-review:http://www.finescale.com/product-info/kit-reviews/2008/10/academy-1-72-scale-ilyushin-il-2-shturmovik
I was thinking about building 'Red 4', but i noticed on your model_1942-side that it has no visible panel lines.
At least i can't see any.
The painting/decal instructions on the other hand correspond with your profile of 'Red 4'.
But there are balance-horns in the kit and also shown in the instructions as to be used on the outer wings sections.
So, do i have to fill the panel lines on the rear fuselage to do 'red 4'?