Gary - Not an ideal solution though I would disagree, M2 has always had a dedicated failsafe channel linked to power relays which removed power to all drives and weapon circuits. Thus the Futaba set is ideal and offers greater security in my opinion especially when you have popped FETs on a speedo sending a bot out of control. Also great for doing a power down reset to your speedo when it locks up i.e. Vantec and Roboteq.

Also whilst I agree it would be nice to have the failsafe feature on all channels, you could ask why should they give it consideration for a market that represents such a small percentage of their customer base. Implementing failsafe properly to all channels takes a lot of processing time when compared to a single channel so I would guess (no idea if Im right though) its not practical for this particular receiver.