I think finless set up a T-Rex with the Futaba 9C or some type of futaba. But basically you need to find a menu that has servo reversing in it. It might be called something different. But look at the servos (ex. for the elevator servo when you give up right stick it should move down). If it doesn't reverse the servo in the menu to the opposite of what it is. Then it should move down when you give up right stick. Then do the same type of thing for the rest of the servos. The manual gives good pictures on what the swash should move when you give stick moves. Then once you do that find a menu that has swash mixing. Like I said before it might be called somthing different. Then this is how all three servos move together. For example with the two back servos the left one should go up and the right one should go down when you give right aileron. If both go up or down then you need to reverse the settings for aileron. Say it is +60 make it a -60. Then do the same type of thing for pitch and elevator. Since I don't have a Futaba 9C I can't give you the specifics, but all transmitters have the same features, but use different names and menus. If you need me to give you the link to the video I was talking about I can. His videos explain things very easily. By the way settings from people to people are never going to be right for everyone. Once you understand the concepts you can program the settings to your likings. Hope that helps.

Nick