This is a very interesting way of explaining how torsen differential work especially using lego pieces.Very ingenious I could never think about this way.I used to work for a used car dealers Ft Lauderdale shop a few years ago and I could not notice that there are so many people who do not have a clue about what a torsen differential can do.And those people were pretending they know many things about the engine and everything under the hood of a car.