TriCopter Yaw (servo) mechanism

This is RC explorer compatible yaw mechanism.
Servo sits in simple frame vertically above the arm. Base part and servo holder are screwed together trough the arm by standart M3 bolt.
Servo arm has to be attached to the side of motor holder (use same procedure as is used in original RC Explorer). Long M3 bolt (screwed into servo) serves as axis for the mechanism.