Started mating the right-wing panel spar to the center section. Was pleased and amazed at how well they went together considering the number of blocks of machined aluminum and spar caps that were simply bolted together and then mating section (spar to center section) fit. Yea, I know, that is how the CAD and CAM capabilities are supposed to work but still, . . . . . . . .
I did add 0.004 thick aluminum sheet between two mounting plates to address an interference issue but after that a 3/16 pin would mate the spar sections.