I put a little sharper convex edge on my 911 today, not that the factory edge was bad. I just prefer them a little sharper. I think it's great that my leather Trailmaster sheath fits the 911 so well. I was carrying my Ranger RD-9 in that one. I no longer even own a Trailmaster. I bought the sheath from the Camillus sell off. It's nice to have carry options.