They may have a machining issue or a lens polishing issue they are just learning of with your help.
The very best steel is made from "recycled" steel - otherwise known as scrap - these days. It's about the only "Made in the USA" steel you can find. You just test the melt and add the right alloys to get the final result you want. I've run two foundries.
The very best steel is made from "recycled" steel - otherwise known as scrap - these days. It's about the only "Made in the USA" steel you can find. You just test the melt and add the right alloys to get the final result you want. I've run two foundries.