The whole construction looks very well.
The construction with own gears and belts shows experience in this field.
The three hole adjustment at the side of the tower promises a lot of futher extensions. More mounting holes in the main plate will be useful.

As the shelters do not really protect the construction for outdoor use I wonder why chains instead of wheels were choosen for the cassis, it always needs a lot more power to drive.

Can you tell a little more about the objects near the ground that are not detected? If that is essential the sensor could be bent down a little and the motor for the sensor head could be placed lower, inside the tower.

Please do also tell whether answers in German are ok for you.
Manfred