Removed plastic and used files, emory paper and scotchbrite to edge finish the left and right F-720 arm rests. Fluted between the holes to get arm rest to line up with holes in skin and cleco'd. Checked alignment of longerons to top of skin and left side of aircraft is off a bit forward of the F-704. Set up blocks and clamps to try and bend it a bit in place. Was able to remove some of the error, enough that a spring clamp will hold the longeron in place.