I remember seeing a tool that would create a number of rings that would =
stack to create a bowl. Does any one remember the name of the tool

It (or at least one tool that did this) is called the Ringmaster. Been several
years since I have seen an ad for one and I don't know who the suplier is/was.
Recall an article in the early years of the AAW journal on how to make stacked
rings on the lathe: author was Andy Barnum.

Kip Powers
Rogers, AR