An uncommon but potentially disastrous gear failure is the zipper on a sleeping bag. Larger safety pins can be used to stitch the bag closed. Then take some cordage and lace through the eyes. If your going to include a hacksaw blade, a metal match is a natural pairing. My recent hand injury has me again practising with and appreciating Sparklites. Firemaking should always be redundant, even in a minimalist PSK. A Sparklite for one handed use, metal match for longterm, all weather and simple strike anywheres. Everyone understands a match, and the trained survivalist could very well be the incapacitated member in a party.