Re: Ackermann video. Ackermann geometry is the inside tire having greater turning angle than the outside tire. You can change the amount by moving the position of the balls on the servo saver forward or back, or moving them closer or further apart on the servo saver. Further apart increases the amount of Ackermann effect. (Changing the pivot ball location on the steering knuckle can also change the Ackermann effect, but there's not much room to do it on a 1/12 scale car.)

The description in the video is incorrect; moving the balls on the servo forward decreases the Ackermann effect.