Yep,
the thing that makes the shapes complicated here is the molding from revell, i tried several combinations of surface creating, and current variant is the closest i can get. Since the revell molded the hull insides as continuous piece (no tapering, i cant do much about it, except of thinning the hull halves, which i would like to avoid as much as possible.
My first attempt was making design directly as per drawings, but i could not get the prototype to fit, too much gaps. The current model fits in 95%, yet i still have to work on it, as mentioned the three flood holes just above the fuel tank are mostly problematic, however this morning i got an idea how to solve it, and will try it as soon as i get home from work. Though bear in mind that this paper model is just prototype with basic shapes, to get the basic outlines of the design area. I will probably make the section virtually elongated into rear with the partial torpedo tube and components near it half sticking out of the rear bulkhead, then it will be added final solid model of the rear segment of pressure hull, just to get the impression through the flood gates that the hull actually continues. I hope this will be acceptable substitution, since i really would not like to whack up the whole hull up due to esthetics, and also gaps would be difficult to fill in this case.