I have an X55, I swapped to the lightest spring, given the small movements this chopper needs, its a lot nicer not fighting the spring tension.
I'm running 15 curve & 80 Y saturation on the cyclic, and I'm happy with that.
Linear collective.
20 Curve on the rudder, I use the top throttle rotary, trying to use the cyclic with the twist rudder is painful to me, both literally & figuratively.
I need to tweak the rudder settings, she is pretty damn sensitive still, oh well, back to Nellis I go!