Hi Jon,

There should not be a problem in using the TK module with your 9C at all. While you will sometimes see a slower reaction time on channel 7 compared to channel 1 (see previous threads concerning this) when using Ailevator, there should not be any jittering and this slight amount of slower reaction is not even noticeable to most pilots. Also since you are noticing this on your rudder channel also, this would lead me to believe the same as you, that it must be something in the module itself.

I would suggest sending this in to the service center to be checked and retuned.

I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.

Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician