Hello, I have the ONEWAY Coring System with all 4 knives. I am very happy with it. I have cored an 8.5 inch bowl getting 2 bowls. Mainly to see if I could. I also cored a 17 inch Oak Burl and got 4 very nice bowls. I have done many others and feel very confident using the system. Now I have a huge piece of maple that I will have to cut down to fit my Powermatic 20 inch lathe. It is at least 12 inches thick with the pith removed. My question is: The number 4 knife says a depth of 7 1/2 inches on bowls 16 3/4 to 18 inches. What would you experienced large bowl corer’s suggest for blank thickness for maximin yield. I am thinking about 9.5 x 20. Any feedback will be appreciated.
Thanks in advance, Kevin