RE: AF5.5 Gyro settings
To get the rate gyro feeling and weather vaning, set GainAngle to zero to switch off hh, then reduce GainOmega to a very small value (around
0.02) and adjust the Offset such that the tail compensates the torque in hover. After that, increase the GainOmega again to get the desired damping. For the T-Rex 700 the values I tested are
GainAngle 0.0
GainOmega 0.1
Offset 0.22
This gives a very soft feeling on the tail.
For the T-Rex 450 I would use the follwoing settings
GainAngle 0.0
GainOmega 0.1
Offset 0.14
You can even use lower GainOmega / damping and use some compensation from your transmitter (throttle/collective -> tail rotor mix)
Hope this helps