Borrowed five K1000-06 nut plates from Dave Pohl and riveted to remaining mounting screw locations for lower intersection fairings. Had to buck two rivets; slipping gun caused small delamination that will need to be infused with epoxy. One nut plate turned out to be undersized; probably -04. Reamed out and retapped to 6-32. Fabricated support rig to countersink lower intersection fairings for Tinnerman washers. One hole in each fairing cannot be countersunk until aft joint flanges are trimmed.