ORIGINAL: Poffit
Okay Cutaway, obviously I am a little weak in the geometry area. I want to make sure I understand what you're saying about the elevator horn. If I understand correctly, the hole that the pushrod connects to on the elevator horn should have an imaginary line that is perpendicular to the pushrod and should extend through the center pivot of the hinges on the elevator.
Do I have this right.
Right. Whenever you have trouble visualizing something like this, think of the extreme case, like where the elevator horn is raked back at say a 70 degree angle. The ramifications of geometry issues are more apparent visually when you take a situation to extremes.
Mechanical models made of cardstock with pin pivots might help sort things out too. I'll often mockup a linkage when I'm doing some new original design so I can make sure stuff is going to work and fit OK within structural constraints.