Attached the spar tips to the main spars. This involved aligning the spar tips behind the flange at the end of the main spar and ensuring the top and bottom flanges of the spar tip align with the same flanges on the main spar. A quick clamp in place, drill out, and its was done.
Next, I drew out a rivet line for RR#9, the most outboard rear rib in each wing. The rivet line is placed just outside of the flange at the end of the main spar and will serve as a guide for drilling out the front flanges of the two #9 rear ribs.
The two spar tips, scientifically marked, with the two rivet lines in plain sight.
