Head Behavior Physical Optimization

Find ideas of things to check if your heli doesn't stay super tight on horizontal axis when hovering, typically circular moving around axis. Can happen since day one or slow degradation.

1) Check the shaft of all swashplate servos: excessive play can result to lack of precision. Compare the servos, they must be identical. Check also when new.

2) No excessive play of ball links, consider experiencing another brand, some are more tight while still smooth, thanks to high grade polymer.

3) Consider replacing bearings if lot of hours
of run. Some can feel difference after major overhaul. See all exchanged parts in picture, more than strictly necessary but since on it..