Drilled and deburred the bottom skin for the right wing, then turned my attention to the left wing. This wing is on a mobile stand which I put up on 4 x 4s to stablize it while working on the wing. I leveled the main spar with a jack in the center then checked the skeleton for twist with string and plumb bob per the plans. I used a shim under the outboard end of the main spar to remove a slight twist. I used the wing skin as a drill guide to match drill the wing walk doubler, deburred both sides of the doubler, then recruited Frances to help hang the skins. Inboard and outboard skins went on easily, holes in spars and ribs lined up well with the holes in the skins.