I think Jim Shoen had the opportunity to refit his coach with a newer design fill tube and he posted pictures here. I haven't heard from him about his success.
I continue to pollute by having fuel puke at least 50% of the time. I do know it never pukes when I use the diesel from the car size nozzles, but that takes forever. I can clean a lot of fuel off the side of my coach in the time it takes to fill from a small nozzle. Some of the timeit takes for me to fill can be attributed to the long range fuel with fills in the 200 gallon range being typical.