Originally Posted by skelrad
As much as I want to just move on, I think I'd better order a new inboard rib and take a mulligan. Thanks for the input.
Well I hope not, I just drilled mine on by eyeballing the alignment. The handbook section 8 (8-14 in mine) talks about this, and refer to drawing 38 for the arrangement of mating bracket F-996A. It's drilled to the fuse in assembly, so any alignment roughly vertical to the floor ought to be fine.