Thanks for the compliment guys!
Here are some addtional pictures of the flatbed. (@Efferman)
The height adjustment mechanism is operated by PF M Motor transmitted through 3-stages of worm-pinion step down.
First stage of worm-pinion step down in front of the PF M Motor.
Second stage of step down on top of every axle passing through the turntable.
Third stage of worm-pinion step down situated below the flatbed.
The proportionate steering mechanism by means of links and gears.
Other close-ups!