i do have kill switch, but i wouldn't want the other engine going like hell while i flicked it and waited for it to cut, then try and recover from the flat spin
i was a bit wary of those elevator runs when a mate got his one ( one of the very first Magnums ) he used it and never had a problem in two years, neither me with mine. just have to cut them the right length so the wire in the end dosn't cause a problem, his was cut so the wire never went in the fuz, mines cut so the wire never leaves