I spent today match drilling the top skins to the bulkheads and J-Channels. I didn't match drill through the longerons though since the longerons were already drilled and countersunk and the bottom skins were also already drilled and dimpled. I drill this line of holes in the top skins on the bench rather than messing up the already prepped holes in the bottom skins and longerons.
Top skins match drilled to bulkheads and J-Channels
