Dissymmetry of Lift is corrected by the teetering and feathering of the main rotor.
The teetering in this statement is actually flapping away from the direction of travel, and the feathering comes from the cyclic input to stop it from happening.
There are forces felt through feedback from the rotor system. In a hydraulic aircraft, these forces are not felt through the controls (unless, in a Squirrel, the forces from enthusiastic moves overpower the dismal hydraulic system). But in the Robbies, you need physical effort on the cyclic to hold it in the position you want. Pulling the trim knob on can relieve some of these forces.