As an engineer.... there are to many things that you need to know that are not known in that attached PDF above. You first would need to know the bare machines exact center of gravity. Then you would need to know the resulting exact center of gravity for any and all implements. And finally you could make some basic assumptions and fairly accurately calc out the effect of the tires being filled to the top of the wheel. But to me, there are far to many things that would need to be told to me first by the design engineers, or I would need model the entire thing in solid with dimensions and material types... it's not a simple question of what effect does the liquid ballast have.... you can't say because you have no clue where you are starting from so that you can begin to calc out the effects.
correct, that's why I called it a teaser. My electronics and nuc. background don't really qualify me for mechanical stuff, just SWAG's.