I’m building a Logo 550sx v2. I have followed the manual and fitted the ball links as instructed.
Im using align DS620 servos and it looks like the control rods are at a slight angle. The servo arms looks as if I need to remove the nuts that are behind the ball end.
a slight angle is usually not a problem. I would leave the nut installed, or at least use a washer instead: the edge of the ball can else cut into the plastic and cause play, while the flat surfaces (ball-flat nut-plastic-flat nut) do not cut the plastic and provide better hold.