Looking for suggestions on the main fuel shut off valve. I am putting the fuel system back in my KF 4 and when I got to the shutoff valve, it was very difficult to turn on and off. I had to get pliers to manipulate it. I took it apart and cleaned it real good. Suprisingly it was not that dirty to begin with. I put it back together and it is still real hard to turn. It appears that the valve block and the seat is a tapered fit and seems like it gets bound up as the retention spring pushes on it. I am thinking about just replacing the whole unit with a ball valve since I moving the valve from the throttle mount to the console anyway. Any other suggestions? I am assuming that any 1/4" brass ball valve will work? Harbor freight has a 1/4" valve with teflon seals so I believe that will handle gas. Probably use these for the wing tanks as well?