About two weeks ago I asked a question regarding unequal elevator travel. Here is the follow-up. After trying a number of different progamming tricks (nothing worked) I discovered that some of the horns were loose. I then redid all of them. Still no success in getting the elevator halves to track together. Finally I realized that one of the halves would not move all the way though its range of motion. After fixing this the elevators now travel in near perfect synch even with just a Y-harness. Sometimes I'm just dumber than I think I am!