As I did with the left wing, I replaced the wing side of the flap hinge with a wider, "dash-4" hinge. This will allow me to mount the flap so its trailing edge lines up with the trailing edge of the aileron.
I also cut the center hinge eye off of the flap side of the hinge, and the two center hinges off the wing-side. This modification wil allow two, shorter hinge pins to be inserted from the center, rather than one long one inserted from the end.