They are all off at the Snowbirds. I know Dumper well and he usually answers quickly. I have run the servo both ways. I think the way shown in the pic is best. I currently have a Solar 658 mounted like that with 3/8 tall ball studs down on the servo saver and the same on the steering knuckle to make the links parallel to the upper arms. Almost zero bump steer and good ackermen. The inboard ball cups just clear the inner hinge pins on their sweep to give you an idea of how far forward to mount the servo.