I did a trigger job on my SD40 and my S&W40 as well. Had some failure to load into battery with my S&W, Sent it back to the factory, they did some work on it then when I received it back I took them both to the range and no problems at all now. They even returned the aftermarket trigger spring I had put into it, it has been reinstalled back into my S&W40 all at no charge to me at all. Now that is customer service and I have a hard time deciding what to carry when I leave the Non Rebuplic of Marylandstine...The non free state...