Riveted the F-729A and B together with the squeezer. Began assembly of the F-706 center section and realized there was interference on the F-729 with rivets to be installed later holding floor ribs. Used a rivet to mark area to be removed. Checked all holes for edge distance. Used a dremel to gradually remove material until the rivet fit in the cut-out. Also had to remove some materal from the F-730 plate. Touched up the primer once modifications were done.