Made the relief cuts in the root ribs; nose and main. Placed gussets and drilled upper holes.
Squared entire left wing skeleton using the piano wire techinique and also a plumb bob. Shiming was acomphlished with layers of tape.
Per SNX -W07, set wing spar attach to wing station 0.00 at exactly 19 inches. Bracing applied. This altered the squaring a tiny bit and another layer of tape was required at the wing tip.
The root ribs were placed and drilled. They were then taken down, cleaned up/deburred and the gussets were corrosion proofed.
Both nose and main root ribs were then riveted into place after careful recheck of squaring and attach spar distance.
