I would suggest that if you were to market the Hunter's Heads to make them in the 145 grain with the original steel, the Ariel 125s were a bit bendy. The difference between a slight double beveled edge and no edge is not that much less work to sharpen if the no edge is to be sharpened to a single bevel as long as the metal is not glass hard. Most of my Hills were no edge and are now singe bevels. The metal on the original Schulz heads files very easy, but they hold a filed edge quite well.