Support BladeForums! Paid memberships don't see ads! I re-profiled my Umnumzaan to avoid the convex edge altogether. Took forever and wasn't needed at the time - after a few months of helping out scoring lumber and cutting open bags of different building materials, it was still going fine(not razor sharp, but would cut safely). I knew eventually I would want to sharpen it how I sharpen all my pocket knives and had an afternoon to spend on it. Once you get the edge profiled how you want it, it sharpens very easily. Better than ZT's treatment of S35VN and equal to Spydie's as some of y'all have mentioned. Unless you want to keep the edge as profiled by CRK themselves for resell or just the closest to how they think it should be used, I'd recommend re-profiling from a convex edge into a v edge. Makes maintenance and any damage repair far easier. It might not outweigh the benefits of a convex edge in real world performance, but it's saved me so much time that I've benefited from the choice.