The fuselage has been modified. It's still a 60 mm wide box section but it's all made out of straight lines. The material is carbon reinforced wood and we had two reasons to migrate to a straight line shape, one is simplicity of construction (each straight segment can be a rectangle of 1mm plywood, overlapped with the next) and also ease of reinforcement by straight carbon fiber rods included inside the structure seams. In this layout, the pilot is also lying down a bit more, to reduce frontal area and interference with the wing.
