This MOC is directly inspired from the Sennebogen 8130 balanced material handler.
Two couterweight at the end of the main mast banlance the whole system, as a consequence it is energy saving.
The real machine here :
https://www.youtube.com/watch?v=064D-2Ah61o

In the MOC:
- 2 Battery Box used as couterweight
- 1 PF-M motor per track (intergrated to the track)
- 1 PF-XL motor for rotation (hidden in the tower)
- 1 PF-L motor for the main mast (hidden in the power station)
- 1 PF-L motor for the couterweight/secondary mast (integrated to the main mast)
- 1 PF-M motor for the tool opening (integrated to the main mast)
- 2 Sbricks

Aesthetic can surely be improved using plate and studfull parts, but with an influence on the weight.

Video will be available at
https://youtu.be/i3XusB1rLk0