I found that directly mapping the head position to an axis screwed up your saved head positions. If you map "REAR" to have your head as far toward the gunsight as possible, and as high as possible, and you map head forward and head up to analog inputs, when you look rear it won't use your saved view, but will look rear based upon what those axis are set to at that moment (or something funky).
Because of this I unmapped all head positions. Pity, though. Pity.