After getting the top skins and wingwalk doublers for the right wing clecoed in place, I started the process of match-drilling and final-drilling all of the rivet holes. A few of the holes on the inboard edge needed to be larger to accommodate the screws that would later go through them. Then they were all un-clecoed and the freshly drilled holes were deburred.
The one leading-edge corner of the inboard skin needed to be thinned out so that when the outboard top skin overlaps it, there won't be as much protrusion. I attempted to use my air-powered angle grinder but I guess I didn't have the right sanding disks to really make a difference. So I used my bench grinder to lightly remove some of that material to get down to the thinner thickness.
Next, I used the edge-roller tool to gently add a bend on the leading edge of the inboard top skin, so there will be less air disturbance near that transition on the wing.
What's next? I have to clear some room around my DRDT2 dimpler so that I can start dimpling these skins and then start on that process.