Hope this helps
Slowrotor,
Lead lag hinges are only potentially required if the rotor can generate roll/pitch moments. The moment causes assymetrical blade flexure, so some blades "cone" more while others "cone" less. This asymmetrical "coning" would sets up lead lag forces if not allowed to hinge. Bearingless designs rely on the lead-lag stiffness being high enough to resist in flight resonances.
Since the R22 is teetering both blades flex the same amount so only the cone angle changes. Cyclic input causes the whole rotor to change it's rotation plane. The only real effect is a momentary increase Nr when collective forces cone angle increase.
Mart