JR still making NHR-03 rotor head.  But NHR-02 and NHR01 are discontinued.

The difference between NHR-02 and NHR-03 is very different.

NHR-02 is swing rotor head.   NHR-03 is the picture.

Also, the screw size for main shaft is different.

NHR-03= 4mm    /    NHR-02=3mm

NHR-03 Rotor head is 4mm bolt to fasten between the center hub and 10mm main shaft.

The linkage is already including.

We believe NHR-03 is much safety and better rotor head.

JR 84026 NHR-03 Rotor Head