Brian, as you see from the responses of three different, very experienced, Wicked Edge users and experienced knife sharpeners, there are different ways to deal with your issue. Part of the learning curve and the experience gained over time with a lot of sharpening done with a variety of knives is we Wicked Edge users learn how to adapt our techniques, adapt or Wicked Edge Sharpeners and utilize external adaptors to get the job done, while overcoming the limitations of our Wicked Edge System. Knowing what route to take, and when, is based on experience, creativity and intuitiveness. I’m sure all three of our suggestions would enable you to successfully sharpen the knife to 15º per side.