I didn't read this whole thread so this might be redundant, but I had really good experience with the Intuition liners I bought at FF for my plastic boots in Alaska. They were super light and warm. I don't know if the shells were necessarily a half-size small, but that does make sense. However, most of the top hot shots in AK were wearing the new hybrid style boots though which I don't have experience with. But when I go back I'll just wear my plastics, b/c if it aint broken don't try and fix it.