Drilled out all of the bottom wing skins today...since that doesn't show any change in the pictures - I will give you my version of a short, short story...
I also drew the lines on bottom skins to intersect the leading edge skin to drill out the tie down access hole. I will show you that picture later - on to the short story...
danger, danger... (foreshadowing)
told ya...got me twice...(the anxious middle)
...not waiting for the 3rd time (solution - happy ending)