Thanks to John Caryl for the following text and pictures :
Simple mod to remove flybar seesaw holder play.
The bushings are found in the Trex kit- the small brass
bushings used under the mixing levers and under the flybar control
lever
The drill bit is a #32
1. Drill the flybar seesaw holder to accept the bushing, use a #32 drill,
turn by hand, only drill 3mm into the holder.
2. Use the flybar as a guide, press the bushing into the
flybar holder. press the bushing flush.