I've modded your last drawing, so you can see the changes I would make. first of all, I slightly increased the LE rake of the canards. secondly, I norrowed the fuse and added the coke bottle shape to area rule the fuse. thirdly, I increased the aerodynamics of the cockpit, by sharpening the rear edge and also narrowing the turtle deck. if you look at the bottom view, you'll be able to see what I mean by recessing the intakes within the sides of the fuse, therefore narrowing the frontal cross section and reducing drag. it's a rough drawing of course, but the intake area and the exhaust area are roughly the same.