There are mid size Kioti and Deere "self leveling" loaders that you can probably study by dropping by a dealer's lot.
I put "self leveling" in quotes because there have been discussions in other threads and there is some opinion that they should be called something different - something that suggests they merely maintain a constant angle relative to horizontal as they are raised/lowered.
It seems only those with sensing mechanisms and hydraulic "leveling" should be called "self leveling" - in the opinion of some folk.
Me ? I don;t care either way, just warning you to be ready for flames (-: