Got the new root rib drilled to the skin by drilling through the skin into the rib. Got the 2nd new tip rib all drilled. Got it taken apart and deburred the new tip ribs and root rib. Those skins have been on and off more time than I could have ever imagined. The final indignity of the many on/offs of the skin was that as I pulled the last cleco off of the 2nd skin for the last time before it all starts going back together, the skin fell off the table on the side away from me. All I could do was watch it go. And it bounced into the hydraulic press (a nice chunk of steel with a bunch of little protrusions and sharp edges). But I had a little luck - no marks or dents on the skin.