Was looking a Dennis Edwards web (http://www.dennyedwards.com/New%20Mo...-1014-pop.html) on Dizzy bowls and had to try make some. Small one (7”) was first attempt and the second one was to be 16”. However several failures resulted in only 12.5. The ring thickness is 1/4” which after completed is too thick. Think it takes practice to get the rotation correct also. Comments welcome.