This is from a couple years ago, I made an improved co-ax press jaw holder housing:
1) Springs don't fly across the room with swapping jaws
2) Housing does not bend when stuck brass is pulled out of die
3) Screws self center
4) Screws hand tighten
Since then someone got the housing drawings from me and built them with CNC and sells them.
Since then I learned a retired machinist did the same thing over 10 years ago.
This is not brilliant engineering. This is what would happen if Gopher shooter supply, Bonanza, or Forster ever had an engineer.