This is some nice equipment! I'm kind of envious, especially if you find time to shoot all of that somewhat regularly.
I was that close to pull the trigger on a great condition 80-200 f2.8 Af-D, but then I realized that the, again manual focus, 80-200 f4.5 just sits in a shelf... But heck, is that old thing sharp, I'd say on par with the 50mm.
Regarding teleconverters, the old 300mm works incredible with the equally old 2x TC, the 1.6 AF TC had worse image quality. And telling the camera that it is a 600mm f7.1 lense gets exposure just right, shooting handheld at ISO 200-400 for stills and 800 for birds and such gets quite some keepers. It does lack the flexibility of zoom, I love this 300 regardless. It is such a master piece of precision mechanics and optics, without any electronics, that I don't even miss AF. Well, most of the time that is...
I like the fish-eye shot with the shoes in it! Just thinking of that problem with a camera where the VF only shows 95% of the image...
Are those Kenko rings any good? I'm asking for a friend with occasional bouts of GAS...