PresumedLost--
Re: bonding a small-diameter ferrocerium rod to a scale: “then you'd need a striker other than your knife blades.. not good”

Have you tried using the tweezers as a striker? Got the idea from an early issue of Tactical Knives (same article that persuaded me to put lanyards on my larger SAKs.)

I've also heard that anything hard--such as a piece of glass-- can make ferrocerrium spark, but haven't verified it. I'll see what I can come up with after lunch, when I get mine out of the truck.

David