Id got a DX6 and DX6i. Got the Main gun to fire, but it has been a while so I don't recall exactly how. I DID reference the posts on RCU. One thing I do remember it is important where which direction some of the other switches are in, so if the switch you are working on isn't responding, try flipping some of the others. Will try to did out my radio and figure out what I did...... Once you figure it out remember to label write it down - unlike me

Good luck