I installed the outboard leading edges and the tanks to evaluate the joint between the two. First the good news: the gap between the two is virtually nonexistent and the leading edges align perfectly.
Now the bad news. Like many people have encountered, the flushness of the two skins is rather poor. I need to probably shim the outboard skins out a bit to bring them flush with the tanks. The worst is about 0.042″, but there are several places that are over 0.020″.