Here is the thread where the build-it-yourself 3 axis topic got introduced to the sweat fitting method. I posted several photos of my method in the post.
http://www.talkshopbot.com/forum/showthread.php?13534-Setting-X-Y-Zero
I came up with the sweat fitting method on my own, there may have been other people who came up with the same idea prior to me, its pretty obvious. Its still the way I use to position fixtures, the main table, etc. I'm glad the idea has spread from whatever source it may have come from.
Also I have a custom superzero made out of aluminum. The sweat fitting method is so cheap, reliable, and flexible that I rarely use the machined part.
D
"The best thing about building something new is either you succeed or learn something. Its a win-win situation."
--Greg Westbrook