The Nittos cannot be flipped on the rim, if I read the pattern correctly. Aren't you concerned that you will eat through them relatively quickly, because you will wear out the outside of the tire?
Maybe you need more camber for all of this to work properly?
In any case, I'll be following your experience closely, please post whenyou get a chance if you don't mind. There are bound to be some people on the verge of switching to R compounds which would benefit from your post...