I met a gentleman around 20-25 years ago that told me the story of the "$500 hammer". Years ago the press went crazy that the government was overpaying for tools for military projects. This guy gave me "the rest of the story". The cost for tooling is what it should be for a limited run of "special metal" tools. I'm guessing the tool manufacturer had to shutdown their normal operations to supply Skunkworks with all new tools. It would have cost a fortune. Not to mention the secrecy surrounding why some company wanted titanium tools. I don't recall if he mentioned the tools were make of titanium, but he did mention that the chrome bake on normal tools had caused problems on the SR-71 project. I'm glad to see that this little tidbit of information was covered in the article.