Ric,, forget about die cast.. True die cast,,like the toy cars.. It involves a permanent mold,,molten metal, injected with pressure, gages to check etc etc. . Wasn't done back then, and not now.. IF it ws a viable method for mass production of rings it would still be used because its more refined now than ever?...
I did never believe to die casting theory at all, but to definitively kill such insane and nonsense theory we have to logically argument.
I guess that bilaminated structure is not compatibile with production by die casting and a confirmation about it would be a perfect assist.
