Thanks for the link, I hadn't found that thread in my previous search....very enlightening.
I read it, and re-read it again, and now I'm VERY seriously considering George's auto-bleed conversion for the two tanks. It sure would be a lot easier to do with complete access to the entire system.
It may be a moot point if I do the conversion, but I'd still like to know how to tell the difference between US spec or European spec filler necks. Anyone know?