Vivi wrote: ↑Thu Aug 01, 2019 9:44 am
I have never had the little J shape near the ricasso have any effect on cutting performance at all, personally.
yee yu right. The
cutting performance is better without a choil or notch. But we were talking about sharpening. If you leave the original Spydie edge as is and 'just go ahead and sharpen' mindlessly

, then the growing J shape becomes bigger and bigger, developing a recurve. And that recurve portion cannot be sharpened on a dead flat stone, because the recurve can never touch the stone surface. The point being, most sharpening stones are flat, not triangle
the J shape can still be sharp and functional, no doubt. and sharpening choils are not needed for cutting or sharpening, i agree. but i also have full understanding when
professional sharpeners grind a generous
choil in all
blades to facilitate the ease of sharpening on their expensive flat stones.