I have done an otter box kit. Serious advice: Keep it simple. The core of mine is a Ritter pack that has been supplimented with Wet-Fire cubes, a BCB wire saw, Ferronium Rod and a Bic lighter. Plus a small FAK package. That rides in my bag. I have other firelighting and FAK gear in my pockets along with a lock knife, small head torch etc. A folding saw is, in my judgement, a damn sight more important than anything else except your knife and lighter. Buy one that you can stick in a pocket. If your not an expert with an axe, don't! Use a saw. Safer and very versatile.