[Draco]

Thanks, Gary, hrogers, gomidefilho, Butelczynski
After printing the internals, I found some details, but all of them are fixable and that's why you do tests.
Anyways, the first try is to the left of the picture. Two important changes: The middle gunner nest made a change of the middle dorsal shape, just above of the fuselage join. And there are two "I" parts, just in the middle of the picture, that will serve as a guide/support of the lower wings. I'll probably make another "I" part, to reinforce more the join.
If you have experience in the assembly of paper models, you'll see that a lot of the parts are over-engineered. That's it because I build my models to last at least 30 years.
So... I expect to finish the internals by the weekend, and after that, I'll do the fuselage skin... with a surprise!