Actually the pads are in the correct place. If you install the horn on the edge of the pad with the horn slightly angled away from the servo it will have the correct geometry. With 1 inch arms at full throw you will have the best leverage. At full throw the pushrod should be parallel with the side of the servo case. In this way you have the most power and resolution at maximum throws. If it is at 90 degrees at neutral, at the end of the throws the pushrod is out of parallel and there goes your resolution as the linkage is over centered. It has always surprised me how many builders miss this even on 40% planes.

Mark Trent