Hello all! I just bought a S&W Model 19-4 Nickel with a 2.5" barrel. (I have the box) The trigger seems pretty hard to pull in DA. It measured at 9.1lbs. In SA it broke clean at 2lbs. 1st question, can the 9.1 lbs. in DA be lowered and not change the SA pull of 2lbs? Of course, this would be...