Theoretically, it seems to me redundant to use an external switch. I mean, the external switch only turns on the VESCs processor and not the power to the motor (the VESC already have it’s own mosfets switches), and still, the switch has to have the mosfets.
well 6.0 includes hardware for a soft switch. but I suppose vesc4 could do some kind of firmware mod to put the processor in sleep mode.
But I’d imagine there is some reason not to do this or else vedder would have just included it in 4.12.
Maybe post on his forum and see what he was to say…
http://vedder.se/forums/