I have the same problem with trim.
With G27 ON, trim for the cyclic doesn't work, but it works for peddals (rudder). If I disconect G27, It works fine on the cyclic, but... I need the peddals and G27 gearbox console man!
Still waiting for ED fix this problem because it's imposible to fly choopers without peddals or without trim!
:-(
PD: I confirm that 2x Alt Right + J trick works in the choopers, time to play offline till solved.