I recently acquired the GMT Pepsi and had a problem with it. My wrist is about 8.25'' and the watch barely fit even with the extender open. So I called my AD and they got me four extra links for it. Also I have been wanting to remove the diver's extension from my Seadweller 50 and replace it with a couple of standard links, so I got those ordered as well. The links came in today and I added / replaced them. On the Seadweller I replaced the Divers extension with two regular links because I never use it. When I dive with this watch while wearing a wetsuit it goes under my suit sleeve to protect it rather than on the outside like a nub. On the GMT I added three links and it fits great now.
Here's the new GMT on my wrist. I ended up adding only two extra links for a proper fit on the GMT and it did take two links on the Seadweller to replace the diver's extension.