Really, hasn't happened to me yet. I will take some measurements to see what these differences are. To the naked eye, they look identical, but the real equalizer will be the measurement. Maybe you're right and I have been incredibly lucky or maybe you're wrong. I will take a look tonight. Never a cracked pintle yet. As for shims, when you replace the nozzles, the PSI you start off with is never the same as the new one. For example, if you rebuild with Elsbett Nozzles, the shims go from what MB put in the factory to incredibly thin shims. If you go with the Bosio, then the shims are generally thicker. Thanks for the info, however. After rebuilding dozens of these, I guess I should have noticed these issues and size difference, or at least encountered a problem.