I added the same 3D sticks to my X9E, fantastic for controlling my 944B, I use the 3D for the tracks so you can operate the boom/stick/bucket/slew at the same time as tracking, or flick a switch and use up/down/left/right on the left stick for more controlled tracking when loading/unloading on a trailer.
I can start a thread if anyones interested (rather than highjacking this one!)
Stu