Finishe deburring the last major wing skin, then started dimpling.
One thing the Vans instructions really suck at, is telling you what NOT to drill or dimple. In this case the most outboard holes should NOT be dimpled at this time. Those are used to secure the fiberglass wing tips, which also get machine countersunk. If you dimple the skin now, you'll have a devil of a time trying to get the wing tips in place to drill aligning holes. Those holes should be left undimpled for now. Later the wing tips can be fitted, then match drilled. And THEN the skins get dimpled and the wing tips get machine countersunk.
