Then only time that I can think when the shut off valve is useful is when I'm about to refuel the model and this is because it will prevent fuel going into the engine if the selenoid was to fail or remain in the open position, other than that I can not get to it in time for any other reason and if I get a hot start the thing that I do is to shut off the engine via the trim.

So for me, I choose to have my shut off valve where I can get to it to turn it to the off position right after I have removed the cannopy the rear hach and have shut down the engine to preven fuel to pass during refulling.