Ran strinq from outboard aileron trailing edge to inboard flap trailing edge. Found inboard flap trailing edge to lie 3/16" below string. Took flap off hinge and rolled leading edge more by hand, pushinq against PVC pipe. Took bottom skins off wing. Primed inboard edge of outboard bottom skin that lies under inboard bottom skin. Inserted washers onto bolt attaching aileron to inboard bracket. Measured uncovered portion of bolt. Cut spacer for that length and cleaned up edges. Inserted washer onto bolt attaching aileron to outboard bracket. Need to make spacer.