~~~ me at our '96 convention, that American turners paid very little attention to where they would place the outer and sometimes the inner ring and, that being the same distance from the edge on both sides and that making the rim one of the areas which could easilly fracture and even crack apart...

...and, I think it was in '98 or maybe '99 in Biloxi, when I demonstrated how to detect Ivories that have been tampered with where such fractures were filled... by either tapping the edge on a durable surface or actually dropping it on a white sheet of paper, on a durable surface where most times the fill would break into specks and the rest could be picked out with a pin and then by holding the chip up to a light you can see the light passing through.

I recently inspected a British set from when they were in India, and didn't notice any difference in ring placement except for a 64 mm piece which was very obvious... so maybe that's what Kenny was referring to.