I spent over an hour scooting around on the creeper marking and drilling the holes through the bottom of the fuselage skin into the wing.
Again, it is scary not really knowing exactly where the hole is going to come through. I had measured back 3 inches from the pre-drilled wing holes before we mounted the wings. When you mount the wing, the holes are hidden.
Luckily, everything went as planned. I kept checking the the holes were coming through in the correct place using a mirror and flashlight.
