Measure to centre the 2x P11 and 2x P31 parts along the QA Lip. the 2x P31 centre hinges should be aligned with the 2x P31 outer hinges along the QA Lip P10

Be careful in this stage not to weld any of the other parts as they need to be removed. only Tack (dont finish weld yet) the outer seams of the 2x P31 hinges onto the QA lip.