So I'm currently designing a model of the Beriev Be-200 seaplane, and was constructing the fuselage yesterday. Upon completion, I noticed that the fuselage was somewhat twisted, the tail and nose were not level with each other. I used some internal braces with this model, but only two, right in the middle. I think they might be the wrong shape, but I wanted to know if there was any other factors I should think about fixing to get the fuselage straight, anything you more experienced modellers might know. Should I divide the fuselage into more parts? Should the internal structure be more extensive? Here are some images of the problematic fuselage to help with diagnosis. I'll include pictures of the parts soon. Also, I could use some beta builders on this one, its more complex than some of my other models.