Lately I have "heard" about problems with the trigger spring breaking. I have fired tens of thousands of rounds through my various Glocks over the years and have never had a trigger spring break. I've been at many high round count training classes and lots of matches and have never seen this happen. Has anybody had this happen to them personally? Could be a (lack of/improper) maintenance problem? I've started swapping out my springs at around 3,000 rounds (when I change out the recoil spring) just to be sure. Thanks for any input.