I riveted up the bottom Rib and the Rudder Horn using the Longeron Yoke in the Pneumatic Squeezer to get around the flange. While it was a fairly quick process, I had inventoried the K1000-6 as a K1000-3/8 24 I was very nervous about getting the wrong nutplte here so I went through rudder attachment section 11.7 to make sure I had the right parts in place. A mistake here would be very hard to fix.