Didn't get any work done last night so got out in the this morning before work. Got the tip ribs dimpled and riveted together. Then put the counterweight skin on and riveted. It was a tough fit and actually had to ream a couple holes slightly so they would sit flush. Still anxious about squareness and alignment of these tips.
Moved on the the forward spar and installed the doubler plates and associated nut plates. Finished with the in board rib and snap bushing. A good morning's work.