Has anyone ever installed a lever type fuel cut of valve just after the factory valve sediment bowl? I am trying to find a way of turning off the fuel without having to turn the knob on the factory valve on and off several times as I work on the tractor. If I leave it on for more then 5 minutes the carb starts to drip. I just figured I would save myself some time. If someone has, explain the type and where you bought it.