I was hunting through the warehouse today for a Pro Series belt and bottom, for instructions I am making. I came across some large D ringed Pro Series Waist belts. We had 10 or so large ones. I didn't come across the medium section, so I don't know how many, if any, we have. That made me think of another advantage of the interchangablily of the Pro Series. If you could use small D's one day, but large D's the next, you can have the two different waist belts, and just one bottom. Oh well. Just thought I'd mention it.
-Sean