though I am a X45'er, I have a X52 (profile in sig)
depends on how you want the trim to work..
if you set them as axis, inside AH you have to assign the axis to a trim and calibrate them to work..
if you set them as bands, you have to set three bands up with a dead band (no movement) on the middle band and assign the up & down trim commands to the upper and lower band on the rotor