What if, when you get a craving, you chewed half a piece of the nicotine gum (or three quarters, if half won't work), and half a piece of some other kind of gum together (effectively cutting in half the amount of nicotine you ingest each time you get a craving, while still getting some nicotine each time you have a craving. And then after your body's gotten used to that amount, you could halve the half, and so on, until you're not ingesting any appreciable amount of nicotine?