Today I began to fit the second left-wing skin. I began by removing the first skin. Then I placed the new skin in place and ratcheted it down. I had measured how far the first skin had overlapped the main spar so I just lined that distance up for the new skin...it worked very well. I then reattached the first skin and match-drilled a hole that I had drilled in the overlapping nose rib.
I then drilled the rest of the overlapping nose ribs. I then traced the ribs as done for the last skin.