I have a Dovo Inox which was used when it was sent to me as well as a carbon steel dovo. When looking at the two the most noteable thing is that the distance between the engraving on the Inox and the edge of the blade is very short. On the carbon steel dovo there is quite a bit of distance between the engraving and the edge. Not suprising since the Inox was used when I got it and the carbon steel was new when I bought it. So here is the question - when does the Inox need to be removed from shaving service and placed in a display case? I am told that this is done when the edge cuts into the engraving on the blade.