I rebuilt my MR12-II and my Conshelf XIV today. Upon looking in my repair log, I realized that I had over two years of treating these regulators like garbage on Bryan's rebuild kits. It goes to show you that the parts are even better than the originals. They were both working fine when I rebuilt them too, they just looked too ragged from all the verdigris. I am not nice to my single hoses.
Now, off to watch Thunderball and get ready for the season of diving