How much of the nacelle struts are structural? I'm asking because you show the struts as one continuous volume reaching down into the secondary hull that seems to include the outer skin. I can imagine their interior containing structural components that support the attachment of the nacelles along with engineering components for cooling, power transfer, etc. woven between them. If the forward and aft parts of the struts aren't structural, but coverings over engineering bits, might you save yourself a couple of meters here and there? Only the structural support elements need to meet at the axis of the secondary hull. The sheathing stops at the secondary hull's skin, and the engineering bits fan out and get where they're going by whatever route necessary.