I started drilling the longerons to the right lower AFT fuselage skin. After completing the lower longeron for whatever reason I decided to measure the skin again and to my horror I noticed it the width was not correct on the widest side, it was 2.5mm short. I checked immediatly the other skin but it appears fine. I'll have to remake the skin, nothing else I can do 2.5mm is way to big an error for this piece.
