I know from experience that the CP4 pump isn't as fragile as some people believe it to be. Shortly after buying my 2011 6.7 I filled it with gasoline. I noticed it pinging and ended up pulling into a freinds place a few miles further down the road where I pumped the contents of my tank into his gasoline pickup and my wife's car. I did this by simply attaching a hose to the hose bringing fuel to the engine mounted fuel filter and turning the ignition to the on position. (It would pump for a few seconds then stop so I had to continue to cycle the ignition key on and off) After emptying the tank I filled my truck with diesel and carried on. About a year later I abcent mindedly put DEF into the fuel tank. This time I caught my mistake before starting the engine and I pumped the tank dry the same way and carried on. If I had towed my truck to a Ford dealer they would have charged me to replace the entire low pressure side of the fuel system on account of the def and the entire fuel system on account of the gasoline. In my case it cost me nothing. Additionally I ran that truck out of fuel on at least one occasion. I ran that truck to over 100,000 miles before selling it and never had a problem with it.