Come on Joe, do we really need to start this again?
On the subject both my NIDs are fine, all my guns see more shooting thena they were made for. A field grade NID or anything else was built to shoot from 1 to 6 boxes of shells a year for maybe 30 or 40 years, a target gun will exceed that in less than a season.
I have cheap Belgian hammer guns (Bayards)that run a couple of thousand shells a year, so far knock on wood, I have had to deal with one broken hammer.