Now you see the wisdom of our having proceeded directly to the manufacture of those little nubbins. No casting, no machining, just direct electrochemical deposition. Precise, pure, and reproducible.
A little physics, a little chemistry, and *poof*, problems go away.
And as far as "Trojan Horse", think more along the lines of "Trojan Spiders", able to go anywhere a man can go, especially for example, underground ...
Why am I envisioning the trojan spider speaking in a Dalek voice while cutting open a door?
And why am I also seeing the event of one walking past some pedestrian and declaring, “You are an inferior pedestrian, exterminate!”
Probably because I am sleep deprived, but that’s when all the horrible and humorous ideas come.