I have been running an Assan system on a Mini Titan with a 7ch receiver and it works just fine. I've just added a Assan X8R9 2.4G receiver to a 50size heli using a Futaba 9254 tail servo.
I am finding as the servo travels it doesn't move smoothly, but stutters as it goes. It sounds terrible too, you'd think there was a gear gone somewhere. Initially I thought it might be gyro issue so all tests I've done are with the servo directly connected to the receiver.
After a lot of testing I've found if I use an Assan 7ch rx it works fine. Two seperate 9ch receivers show the same symptom. I've tried different transmitters Futaba FF9 and a FF8 but problem stays with the 9ch rx.
Just wondering if anyone else has come across this before and is there a solution? I am thinking probably not and it is some issue with the pulses fed to a fast servo that is the issue.
Tried contacting Assan but have not even had the courtesy of a reply to my query let alone a solution.