I'm so sorry to write that, but...
http://shipbucket.com/forums/viewtopic. ... 70#p184057
We're in exactly the same place... shading.
If I were to interpret the shape of the hull based on how You apllied the shading, I'd think something like this:
(green is "what I see", blue is "what ought to be represented")
On top of fuselage it suggests that the vertical stabilizer is nearly as thick as fuselage, which simply transforms into it, on the bottom, the thin shading on nose does not correspond to wide shading on tail.