4Close up of the top bearing (for horizontal movement)
5Close up of bottom bearing (for vertical movement)
6Close up of up-and-down balance system. Here you see the Manfrotto Parts I am using: sliding mounting plate ( Model #357PL) for the front-to-back balance and the ball camera leveler (model # 438) for horizontal adjustments.
7The unit mounted on a jib arm that is mounted on a camera dolly (built out of a old lawn mower).