I have two Toro Custom ll, series 90 12 station controllers...neither of which work. I would like to have you pick and choose the best of these parts to build me one working controller, or steer me in the correct direction to replace the controller only. I use it for dust control in a 5 acre parcel and do not plan to dig up and replace all the existing water and hydraulic control lines...or is it possible for me to build a water manifold with a series of ball valves to shut the pressure off to the valves~then drain off the dead side with an external drain line and additional ball valve? I guess this system would consist of 24 ball valves and I would need to close one and open one to operate that sprinkler head.