It appears that the bushing the rod end screws into is too short. The bushings on my classic 4 stick out about 7/8 inch past the rear of the fuselage tail post which is near even with the center of the cutout in the rudder stop tabs.
This one has just the foam gap seal on the tail post. The rod end check nut in this picture is tight against the end of the bushing. The left end of the ruler is near as I can tell where the rear of the tail post is.