I like the use the kill button on my TX...its fast. A back-up would not hurt...maybe a good thing. One thing I would like to see posted here is some examples of why a person gets into a situation that you really need to use a kill switch...together with the ways to avoid bad situations. Also I do not think any kill switch is 100% reliable if it is activated by the radio system. So lets here your stories! Capt,n