I looked at a decent Security Six 4" today. The only problem was that it was modified(why?) to shoot DAO. The counter guy said someone had filed of one of the sears on the hammer. The fix would be a new trigger. I have Stainless Speed Six that I love and I could use another Ruger. I'm tempted to field strip mine( easy operation) just to see. Is this guy correct or would some other modification been done to make it DAO? Also, how difficult would it be to locate a trigger. Thank you.