Cubfloater: I was a little "weirded out" when i built that part of my hog bipe as well. However, that is what the manual calls for. There are a few other things later in the wing building that beef that part up including a solid top spar, a wing joiner as well as two cabane mounts the span a couple of ribs. All said and done, the center of the wing seems to be pretty strong. I still plan on fiberglassing the center section on both wings given that this plane is a real performer!