I have a monsun-tison joystick dcv Model pcl401-349, I am going to college for industrial mechanics and we came acroos this dcv valve. We currently have no schematics on it and I was wondering if you could help me out with this problem. This is for educational purposes we are going to build a circuit around the valves and we would like the schematics to know how it works and were to get parts if we need to. Any info would be greatly appreciated.