I have a 10X. I used to have an 8103, and I must admit that depending upon what else you have plugged in, it might be a problem. Send a message to Doug Cronkhite's (Doug, I apologize if I spelled your name incorrectly) SA list--there are lots of JR team members monitoring that list and you should get a pretty quick answer. If you can't use your TX to mix the rudder servos, drop the $44 and make it easy on yourself.

Ken