I’m sure that is the set of notes referred to.
Makes you think - that nothing as complicated as this would be produced today, and no manufacturer would undertake this level of explanation.
BTW, I think that you are right that the model has a mind of its own. My pantograph and sound/control issues with it have been resolved by random events - such as an unintended full throttle up with a Z-4000 on accidentally starting in conventional mode. Go figure.