On the subject of failsafes the receiver appears to continue outputing the current position on all channels for one to two seconds after the transmitter is turned off. The throttle channel then outputs the failsafe position for about 1/2 a second before stopping all output while all other channels just stop all output.
So does this mean that, if I'm using an Electronize controller for example (without any built-in failsafes), I can just connect it straight to the receiver and the robot will stop moving when the transmitter is turned off, or would I need to fit an external failsafe between the ESC and RX?