[TexasSP]

This could very well be an issue with the hardening process itself. It could have gotten too hot, not hot enough, cooled down too quickly, and so on. I remember Mike had some bad pinions a while back as well. Although I am not casting any blame on Mike himself for this just saying that it happens.

I have had guys screw up the hardening process for me on many occasions so it is very feasible.