I have seen a home-built version somewhere, but don't ask me where. It was a while ago, and I can't recall on what forum or in what context I ran into it. About the only thing that sticks in my memory about it is that it seemed quite bulky.
As for a commercial or OEM version, I've not seen one. I'm no expert on the matter though.
Hello Cliff. I have the feeling you opened a "pandora's" box with the copies of plans you have.
I am also requesting a set if you have time.
Of all the accessories and special tooling ATLAS made I do not understand why the QCGB was not offered as a option or add on.
I think the same thing. A scaled down version to fit the 6" would likely have cost as much to make as the larger one. And the selling price might have been higher than that for the lathe itself. So very few would likely have been sold.