• What is the 'something' and what is the flaw? Red Mercury https://en.wikipedia.org/wiki/Red_mercury It may or may not exist, and the real flaw is that it's as unstable as...? • What does the antagonist intend to do with this thing, and why doesn't he just wait until the boffin has perfected it and made it safe? Blow up the West...the agent who will deliver the device is a mujahid who will happily die for the cause. • What is the required component, and why is it only available from a single source? Has to be obtained black market..
Interesting, over here in the States it's "never minded", another one for the US/UK/Australia idioms thread...
Actually 'never mound' was a personal joke between myself and a dear friend of mine, back in the states. I've never heard anybody else use it. It was his play on 'find/found,' 'grind/ground,' etc. He did know how to make me laugh. And some things stick over nearly 45 years.