I have been wanting to get a trigger job done on my 19. I would like to take the trigger down to about 3 pounds. Has anyone had this done to theirs? I also would like to know a certain price range I can expect to pay. I don't like the factory trigger at all. It is stiff and I want it to be smooth. I am also considering adding a tungsten guide rod. Do these add much weight to the gun? Thanks for the help.