I`m really a coder not a modeller and while I can hack a bit of code to apply transformations to an existing object I can`t design an object myself more complicated than a box.
The "gunner" and "passenger" are just simple rotations applied to the existing "pilot" model that cryingtoto designed for the spitfire packs. There is no tranformation I can apply that would make him lie down I`m afrais