Just a little problem. Trying to finish up this airplane. I was ready to glue on the vertical stabilizer and rudder. When I fit the piece there was a gap and it didn’t sit flat on the horizontal stabilizer. A close inspection revealed that the lower stab rail had developed a slight curve. Probably from sitting around so long and the covering pulled that rail piece into a curve. I should have added a vertical support piece to keep the frame straight. Lesson learned. I’m going to shape a square stock to glue in place and fill the gap.