It wouldnt matter what country the tooling took place in, it would still be the same, you are complaining about tooling that is about 44 years old, tooling wears out over time, the only way to stop all the flash is the to either repair( if thats possible) or replace the tooling. The "Chinese" can send all the test shots they want back to R2, and its not gonna change a thing.
So if you really want to place some blame, place it on the old tooling and R2 not wanting to replace it.