I've read of an ejection problem that plauges G19s immediately or low round count where the case doesn't clear the slide but bounces around (ending in jam or "bullet to face"). I had heard various claims of this being the ejector, or the extractor, or replacement of either to be the clue. I also heard that the problem was present on new-manufacture Gen3s too. What is a good way to get a good running G19? If certain parts are suspect, what can I inspect to check that the problem has been resolved on a gun in the store? Should I go Gen3, or in Gen4 safe now? Thanks. . .