By the way, is the Lens Exchange worth getting? It's not in the sale, but I was considering it for a while. Don't know if I want to lug the 70-200 on my belt tho'
It works as advertised for mid-air lens changes. I wouldn't wear it on a regular belt with a 70-200/2.8-size lens, but it's fine on my Lowepro Deluxe Technical Belt. It doesn't have as much padding as a regular lens case for that size lens, but it's smaller, too.
I've been thinking of getting a second one, as I've been using the one I have primarily for my RRS PG-02 LLR gimbal head.