I have reworked the bottom and the front of the fuselage to be much closer to the actual shape. Even better, I managed to do it without adding a ton more polygons to the model. Holes were cut for the pilot and observer seating areas. The fuselage was remapped (very rough test job), and the mapping for Boof's pilot was added. Polygons now stand at 10302.
Interestingly enough, when I added Boof's earlier pilot bust for the observer, it would not get through the Kex converter and was messing up other parts of the plane as well. It looked fine in Blender.