Even after Great advice from you guys I elected to use Martin Clips on my wing ribs. (i've been getting a little lazy).They look OK and very secure on 3 inch spacing X 1/8 in. holes. I'm not recommending this yet and it will be Christmas before the plane is finished. After the holes were drilled, it took about 20 minutes for each side of wing. Only thing it makes a small ridge running down each capstrip.Maybe I can get some pics on here later.