Mike,

I'm going to start with the basics and we can go on from there if this doesn't work. I'm really hoping this is a 28% edge and not the smaller one.

Start by making sure that all the transmitter trims are at neutral. Next make sure that the ATV for the elevator is set at 125%. Make sure that the sub trims are at zero for the elevator channel. Set both the high and the low dual rates at 100% for the elevator channel.

Now center both of the servo arms at the elevator servos. They need to be exactly the same if at all possible. I don't know what type or length servo arms you are using but if you can, set the clevis/ball link on the servo arms a distance of 1-1/8" from the output shaft. Now go to the elevator horn shafts and set the horns on the screws. They must be 1-1/8" or more from the center of the clevis to the center of the bevel in the elevator at the hinge line. This must be the same at both sides. Having the distance of the clevis pin to the hinge surface less than that of the servo arm provides mechanical advantge to the flight surface over the servo. Not a good thing.

From this point you may need to screw the elevator horn in or out one turn either way on each elevator half to get the servos to match up, but not much more. That's about as far as you can go with a reversing Wye, so if that doesn't work I don't know what to tell ya. It's possible that the elevator horn shafts to be off from each other a little but that's something that needs to be attended to prior to the final assembly process. It can be done late in the game but it's awkward having everything permanantely attached to the fuselage while you're working on it.

Let me know how you come out using the above.

Pat

Edit below:

I forgot to add that once everything has been neutralled out, and both servos are matched in position at the servo arms, the control arms for your elevators must be exactly the same length. Measure the control arms from the center of the mounting hole for a ball link (pin of a clevis) at one end to the same position of the ball link or clevis at the other end.

Few servos are perfectly matched out of the box, so if the above doesn't work out I don't know that there is a lot more you can do with the accessories you currently have at hand. Perhaps others may have some more ideas.