I agree. Actually, it is quite hard to figure out exactly based on the drawings in the book. I used a 3-view drawing found on the web that is probably rather wrong. I am sure that it is not that hard to do much better than that.

Apparently, many people worked on this design. I found this very cool follow-on design while surfing the web to find documentation. This looks somewhat more "realistic" or at least less cartoonish, but maybe it has less charm because of that.
http://gsainz.free.fr/image/espadon_pic/render/espadon_5r.jpg