While not a quite a true "zero edge" a nearly full convex edge is visible on this Bravo-1 from where the grind starts near the top all the way to the bottom. To maintain this same edge I would need to sharpen it from near the top every time with a medium that approximates the same curve. A slack belt is the easiest way to do this. That is what made in the first place. But that means removing steel from a lot of the blade each time I sharpen it. I will likely not do that, but start a secondary convex bevel somewhat closer to the final edge. It really cuts well. On the YKLE beneath it, you see a definite secondary edge bevel. I have since reprofiled the YKLE to a thinner edge with a narrower angle.