Wing laser levelling procedure and initial clecoing

This is a demonstration of the procedure used prior to riveting the bottom side of the LH wing. An initial clecoing of the RH wing is shown, which was checked with the same procedure. During this process issues were found with the RH leading edge skin - a mismatch between ribs 7 and 8. This led to a lot of investigation and efforts to get around this, before finally accepting the need to upsize/recentre and elongate the offending skin holes (to 4.8mm rivets)