Layed out rivet holes on rear upper strut fitting (7V4-4), "L" channel angles & fitted on rear channel between ribs # 3& 4. Refit rear channel at root rib to 715 mm from front of spar. Retrimmed outboard channel at 45-degrees to 415 mm from center of rib # 6 to end of outboard channel. Drilled a hole for a flush rivet in the upper strut fitting so "L" channel lays flat.
