Match drilled right flap brace to skin. Drilled "keeper" rivet holes for hinge install per Dan Checkoway's method. Removed parts. Machine countersunk flap brace and dimpled wing skin. Countersunk spar for root end of flap brace and dimpled inboard three holes of flap brace. Deburred all parts. Primed inside of flap brace. Riveted three inboard rivets attaching flap brace and spar. Used two cherry rivets and one regular rivet.
