Did Garry change his balloon text? Or did I change his?
Either way,
1) Negative Lift is still negative vertical force.
2) I pretty much sandbagged this project.
I just simply lost interest. So many things could be done with it to improve it, I just moved on.
I considered releasing it in FacePunch Lua scripts section (Not releases), but as usual, FP mentality just made me decide not to.
If anyone wants to pick it up, feel free.
Biggest next step in the project (in my mind) would be to have it save the constraints already used on whatever you're turning into a balloon.
I've always hated the "Physical properties" stool for losing them.