I am the previous owner...Cobalt is correct. I never did anything but admire its heft and balance and beauty. I would not have gone near this edge when I owned it. I did not have the equipment, tools or knowledge to do anything with it other than admire. This is a beautiful beast of a knife and unless you have it in hand, it is hard to explain...the deal is more than good if you consider what you are getting...full nuked Proto, with 100% zero edge factory grind all the way from tang to convex edge. This is a special knife if beauty and bomb proof are your thing, and represents some high level grinding to achieve the geometry. At this price, go beat the hell out of it and enjoy...this is one of the most solid feeling knives I have ever held in my life. Many would thin the edge for slicing, which I would do now if I could afford to buy it back at this price! I use my SHSJ's now...