Saw it in this post:
http://www.homemodelenginemachinist.com/index.php?topic=5361.msg57395#msg57395
Thought it was such a cool but simple tool that I just had to have one. So here is mine. Used some 2" square aluminum stock and then faced it on the lathe on 3 sides (left the other 3 alone). Mounted it on the compound in place of the tool post and made a groove in it with a 90 degree drill mill. Nice thing is that it is centered on the spindle without any effort. Then drilled 4 holes to use to clamp the round stock in the jig. I went with bolts rather than studs so I can work closer to the collet. So there it is; dirt simple but very useful.
Full credit to Foozer for the great idea.
In one of the posts, the following YouTube video was posted:
