Today I fitted the left half of the vertical stabilizer. It fits very well to the lower and upper fuselage, and to the right vertical stabilizer half. What I'm uncertain about is the width of the opening at the trailing edge. The measurements referenced in the manual make no sense. My concern is that the actual width of the opening is pretty narrow compared to the width of the rudder. After dinner, I fabricated the duct flange for the fresh air inlet.