Hello Homma
What matter how happen in this Chiyoda case? Not sale site only ,Operation site also not do properly job.
I have feedback to my Operation site Engineer to careful on material character. To proper design punching process and Packing STD more and more. This is case study for us.
But I have a lot question red font of your mail below. So no need to mail ding dong. Just know both of department have improve the way to work that all.