It was A big surprise to me because I was always told that TXs were all different and it wouldn't work. When I was building A lot of planes for other people I always set there plane up in my TX just so the servos were at least close to center and I was able to make up the control rods and what not for them.
I have the 9-C and most of these people did too. We finally tried setting up another 9-C radio with the same settings that were in my radio and they were perfect when it was time to maiden the planes.
A big surprise for me. I now wonder if I can set up A plane and transfer my setting to something like the JR 9303 without any trim problems.