Sticky friction lead-lag dampers cause a main rotor 1/rev slight to medium lateral vibration. The dampers can be phased in the air by a quick, small diameter counterclockwise circular movement of the cyclic. An alternative method is a hovering autrotation.
There is something to be said about owning a piece of history, even if only for a short while. The skills acquired flying an underpowered helicopter with manual throttle and no correlation will serve you well in the future.