This is just a question but I have seen this on some plans and not on others. If you look down at your plans and look at the spars is there a doted line running across the top of the spar?? There was nothing at all mentioned about the angle for the root ribs?? Nothing there for the degree of offset?? Just wondering. Most the time the GP kit instructions are so well writen they leave little to think about, I don't know why they would miss something like that.