I love these radios. There's almost nothing ostensibly wrong with them. I've rarely had connection issues, the joysticks are responsive and easy to trim, and the receivers have an abundance of channels.
They are also pretty darn easy to set up.
Ensure your electronics harness is fully connected, excluding the battery. Disconnect the motors from your weapon and wheels. The motors should all be free-spinning, such that you won't get hurt if they start spinning unexpectedly.
Connect the bind key across the B/VCC port of your receiver.
Connect your battery.
Turn on your transmitter (controller) while holding down the bind button in the bottom left.
Turn on your killswitch.
Your transmitter should leave the "RX Binding..." screen and your ESCs will start beeping.
Put your joysticks in the center, or move them around until they stop beeping. ESCs beep when they're trying to zero themselves, which may mean they want to see the center of the joystick axes or a maximum or minimum.
If everything spins, you're good to start plugging things on the proper channels and programming mixes.
Ensure your electronics harness is fully connected, excluding the battery. Disconnect the motors from your weapon and wheels. The motors should all be free-spinning, such that you won't get hurt if they start spinning unexpectedly.
Hold "OK" button.
Select "System Setup" Menu on the left.
Click "Down" until you see "RX Setup." Click "OK" on that.
Click "Down" until you see "Failsafe", click "OK" on that.
Select a channel you want a failsafe on. Might as well do your weapon motor first, which I like to put on Channel 5.
Press "Up" or "Down" to turn the failsafe "ON" as shown on screen.
Move the selected channel's physical input to the position you want to be the failsafe.
Hold "Cancel" to save and exit.
Hold "Cancel" to save and exit again. This must be done both times in order for the failsafe to be saved.
Once you do this for all of the channels you need, go ahead and try setting these physical inputs to something different than what you put for the failsafe (i.e. moving the joystick that spins your drive motors to something other than dead center, or cranking one of the dials for the weapon).
Turn off your controller. All motors should stop moving.