In the interview, pasted below, he names all his stuff. Yes the 20 ride goes un-named. To me it appears an old A on that Johnny Cash vid but who knows. You are trying to tell ride cymbal weights from recordings? "SF: Has your cymbal set-up varied from the ’60s to today? JG: It’s pretty much the same. I use a 22″ Zildjian ride now which is kind of a medium. I use Paiste hi-hats that are 14″. I like 15″ crashes a lot and I’ve got two really nice 18″ Zildjian crash cymbals that are pretty well matched that I use onstage. I’ve got some 16s, 17s, a couple of 18s. I’ve got a real nice Chinese cymbal—a Paiste—which is great for roaring. It sounds like the ocean. And I’ve got a real nice 20″ ride which just cracked on me. I’m heartbroken about it. I’ve got a few half-cymbals that I still try and use, too!"