I now try t avoid layering as much as possible. Crazy how our ceramic world has changed isn't it? I never imagined that matching a single central would be easier than it used to be with porcelain.good point. i got a call from the linked case i completed in this thread...Dr said the patient was ecstatic and she had zero adjustments on anything for the insert. 6 unit micro layered anterior cosmetic case and it took longer to remove temp cement than to seat all 6 crowns. grinding? what grinding?