I think these punch damage is due to tolerance between punch and work,
and the form of work, it means the form of work doesn’t seem it’s not actual round ○.
Because the work was damaged to 2 side corners, not all of corners.
Do you find it on the photos?
Also one punch is big suffered when press.
I think it’s too big damage as normal press condition.
Can you explain it to Tongkam san, and Tsunekawa san.