Looking at purchasing the watch mentioned in the title. For some reason it speaks to me. I personally don't care one bit about it being a "limited edition" and would really like a caseback that has a window like many other Oris watches. Would I be able to take a windowed caseback from another ProPilot and use it on the Air Racing IV? What do you think the chances of Oris selling me one in this configuration would be? Slim to none? Thanks. Also, why I'm here, I'd like to here your opinions on the Air Racing IV in general.