I agree that your current systems probably won't accomodate my request as they are - for one thing, Tankhobby's system doesn't interact with the ESC and draws power from the battery directly. Your idea of using the sound output to trigger an external circuit and relay was kind of what I had in mind, but I was thinking how about detecting the end of the long signal to the LED's on the DBU when the tank dies - does this last as long as the death sound plays?

'Player Honesty' was probably a bad choice of phrase: I was thinking about having to explain how and why the tank needs to be shut down when the "lights on top come on and stay on" to some of my friends' children, and then getting them to do it at the right time... [sm=confused_smile.gif][sm=drowning.gif]
Compared with that, asking for a relay circuit to be added is easy... [sm=biggrin.gif]

(edited for bad proof reading...)