What an awesome idea! I like the ferro and magnesium part. That is what got me thinking. I would want something like a flat Leatherman. I would like to have a straight pin or a big needle to sew with. I want a GOOD pair of tweezers, better than the Swiss Army ones, but if not possible at least the Swiss Army ones. Something to write with. Would a thin removable ferro rod work as both a pen and a firestarter? I would want a blade similar to a Buck 110 folder in there because I love that knife and it works good for me or a setup like the Kershaw Onion knife with a lock to keep it closed. I don't mind if it is a little thicker than normal to accomodate a blade like I want and possibly a slide out compartment for a couple of matches. The LED light is a plus. Don't know how to fit a mirror in there but I would like one. Add a whistle and a lanyard hole and BAMMM! Hopefully it would fit either in a wallet or in the back pocket with the wallet. This has me eyeing my Buck 110 now and wondering if I could hollow out the wood side and possibly drill holes for a pen, a ferro rod, and tweezers.