First to answer the question before the airline debate started. triangulated 4 link does not allow you to keep the stock tank placement. wishbone 3 links or parallel setups are the ways to keep it there. Secondly, Plastic DOT airline is extremely durable in itself. Scrap shit on the road is about the only thing that will rip an airline. The problem most have is no the DOT line, it is the Push-To-Connect fittings. living in areas where the connections are susceptible to moisture and freezing, and salt/brine can destroy these fittings. This is about 4-5 months out of the year for me, this is why I don't PTC fittings. Since you're in SC I doubt you would have any problems running them. Manifold valves are the new standard in air suspension. The individual valves are on the way out. Inexperienced Individuals will need the simplicity, and Experienced individuals will respect the simplicity. In less than 5 years, It will be harder to find trucks without manifold valves than trucks with. Individual valves are good for 2 people: The ones that want to mount valves right near each bag, so it ridiculously fast. The ones that have spent so much money else where before buying Air Management. Now to address the driving without air in the tank: Unless you have a check valve mounted before each fill valve, after the tank, you will not be able to drive without tank pressure. the tank pressure is what keeps the valve shut when the solenoid is not energized. drain the tank, and you will drain the entire truck, Unless you run check valves between your tank and fill valves. Now with a manifold valve, that is only 1 check valve necessary, unless you want 2 on the vu4.