I keep seeing the phrase: "so I just put a new edge on it..." or something like that on the knife discussions. Question: Are you talking about sharpening an existing edge, or can a completely new edge be ground onto a knife as a matter of course? If so, how? Do you need a grinder or belt sander to do this? Is it hard to do? Also, can a knife edge be changed from one type (i.e. chisel grind) to another as a routine procedure? This is kind of a basic question, and maybe I am not catching the substance of the discussions exactly, but any basic info. on this is appreciated because I really do not understand it.