Plastic vs. Metal ya know what I mean? The ball valves are simple, effective, very little to fail and if it does fail it costs $25 to replace the valve. I like that I am in control of it now and it's right at my side. I don't have to wonder if the FSV is filling the wrong tank and about to let me sit in January like it did the last time it screwed me.
The only thing I would have done differently is moved the valve for the rear tank in front of my seat on the floor on the angle. My bench is shot and it's a pain in the ass reaching down there on the fly because the seat is shot and it sags out to the door. Definitely would not have wasted all the time rewiring and messing with the toggle either. I just didn't figure out the wiring until I was down there tearing it out. If you use the truck for your business as I do just be aware of educating employees on the system.
The other reason I did it is because I noticed my metal fuel lines were getting rusty and I had a hole worn through the line running up to the lift pump. The rubber line just made sense.