The Short Ball Links (107-101) were omitted in early kit releases. Cut some standard links down to size.

Double check the inner diameters of the thrust bearings.

The Bell Mixer Button Head Screw (101-412) is important for smooth rotor head movement. Tighten it all the way until the Bell Mixer Arm (120-116) is hard to move. Back the screw out slowly until the arm moves smoothly and freely.

Todd uses one thick and 1 medium shim for crisp 3d response from the head.