I had issues with the plate falling out after I put extended firing pins and RAMI firing pin springs in my match and backup guns. The firing pins came from CZ Custom - in comparing them to the factory firing pins, they were binding ever so slightly with the spring in the firing pin channel - I went back to the factory firing pins and used the extra springs that came with the guns (a Shadowmate and a Shadow Orange); the extra springs were actually quite a bit lighter than the RAMI springs, and definitely lighter than the springs that were installed by the factory. Also, one of the extended firing pins I received was bent ever so slightly, and bound up in the breech face. I'm off to Provincial championships this weekend, but I'll put a micrometer on the factory and extended firing pins when I get back - I forgot to do that before.