\defaultfontfeatures[NewCM10-Book]{%
  Renderer={HarfBuzz},%
  UprightFont={NewCM10-Book.otf},%
  UprightFeatures={%
    SizeFeatures={%
      {%
        Size={-8},%
        Font={NewCM08-Book.otf}%
      },%
      {%
        Size={8-},%
        Font={NewCM10-Book.otf}%
      }%
    }%
  },%
  ItalicFont={NewCM10-BookItalic.otf},%
  ItalicFeatures={%
    SizeFeatures={%
      {%
        Size={-8},%
        Font={NewCM08-BookItalic.otf}%
      },%
      {%
        Size={8-},%
        Font={NewCM10-BookItalic.otf}%
      }%
    }%
  },%
  BoldFont={NewCM10-Bold.otf},%
  BoldFeatures={%
    SizeFeatures={%
      {%
        Size={0-},%
        Font={NewCM10-Bold.otf}%
      }%
    }%
  },%
  BoldItalicFont={NewCM10-BoldItalic.otf},%
  BoldItalicFeatures={%
    SizeFeatures={%
      {%
        Size={0-},%
        Font={NewCM10-BoldItalic.otf}%
      }%
    }%
  },%
  SlantedFont={NewCM10-Book.otf},%
  SlantedFeatures={%
    SizeFeatures={%
      {%
        Size={-8},%
        Font={NewCM08-Book.otf}%
      },%
      {%
        Size={8-},%
        Font={NewCM10-Book.otf}%
      }%
    }%
  },%
  BoldSlantedFont={NewCM10-Bold.otf},%
  BoldSlantedFeatures={%
    SizeFeatures={%
      {%
        Size={0-},%
        Font={NewCM10-Bold.otf}%
      }%
    }%
  },%
  SwashFont={NewCM10-Book.otf},%
  SwashFeatures={%
    SizeFeatures={%
      {%
        Size={-8},%
        Font={NewCM08-Book.otf}%
      },%
      {%
        Size={8-},%
        Font={NewCM10-Book.otf}%
      }%
    }%
  },%
  BoldSwashFont={NewCM10-Bold.otf},%
  BoldSwashFeatures={%
    SizeFeatures={%
      {%
        Size={0-},%
        Font={NewCM10-Bold.otf}%
      }%
    }%
  }%
}