I dunno if he still does. I'm crying on the inside because I manned up to buy the tool and Mazdatrix said I have to wait a teeny bit, because it's special ordered =( I'm interested in learning any technique as well before I use this tool. But I found an awesome youtube video you can watch that will help. I think what they are using is a custom made tool though. I let you know how it goes once I get the tool. Here's a link to RE Amemiya tearing down down 20B.
http://www.youtube.com/watch?v=gcrVxI0Rk-w Shaft seperation seen at 5:34