Roger, your anxiety over rib stitching is somewhat understandable but if I can do it anyone can. I finally caught on to the knot after about 10 attempts on a practice piece. Took about 2.5 hours per wing on a rotisserie. Looking in from my wing tips the lacing lines up perfectly and if laid out correctly you don't run into any internal wing components. Quite proud of it if I may say so and feel confident that it was done right. It actually was an enjoyable part of the build.
With the speeds attainable now days in the model 4's -7's I feel it's easy and cheap insurance.