Don€™t tell me I€™ve killed this long running thread by going back on topic!!! ;-)

Anyway€¦€¦€¦

Been thinking of a simple way to show a robot is in failsafe mode - which I take to mean lose of signal.
If you have a spare channel on you RX you could plug in a FS1 failsafe unit connected to a servo which operates a micro switch. This micro switch operates a LED.
Normal operation - the micro switch is open, leaving the LED Off.
Lose of Signal - the FS1 activates (along with all other failsafes in robot), moving to its failsafe position, which closes the micro switch, leaving the LED On. There by showing failsafes are active.

You may also be able to incorporate the €˜remote kill€™ into this set up.