I have completed my Porsche 944 conversion and I am running 260 volts at about 110 amps with a warp 9 motor. I have had some bad experiences and I wont bore you with the details but I am looking for a mechanical high voltage high amperage shut off or even a way to sever the "00"cables while under load? I have a low voltage shut off for the contactors but I have had contactors fail! I want to manually disconnect the high voltage side as an EMERGENCY FAIL SAFE regardless of the damage I may do the motor or controller. Any Ideas?