Who decided a PSK is limited to one tin? I started out with the classic Altoid tin, upgraded to 2 surplus aluminum swedish first aid tins ( carried on my channel islands misadventure) and now carry 2 BCB type tins. One fault of these tins is simply getting access to a particular item.The reduced contents size makes dropping anything a real headache. This is where a brightly coloured bandanna or Shemagh comes in real handy! First Aid items are going to be severely restricted to begin with, So I segregated mine into the second tin with a cross peened into the lid for quick I.D. I do not need an impromptu game of 52 pick up digging for aspirin if my companion is suffering a heart attack. The classic wire saw and button compass were developed for downed british pilots. The saw was actually meant to be used on seasoned fences and not so much on resin filled living trees. There are surgical wire bone saws available. I played with a few, thinking a saw meant for living tissue would perform better. The result produced no discernable difference. The button compasses were just that: concealed in uniforms as buttons. These are general bearing compasses used with those collectable silk maps. But do not underestimate one for wilderness survival. One degree error in a mile equalls 92' ( information from THE 2 OZ. BACKPACKER by Rober S. Wood.) I don't know about you, but unless I'm in an Orienteering competition with my old SIlva Ranger I just need to know Los Angeles is 'that-a-way.' After thats it's easy navigation by the local gang graffiti, though the armenians don't bother with it <img src="/images/graemlins/grin.gif" alt="" />. people need to RESPECT their gear and believe in it. If you think that button compass and old USAF survival knife bought on EBAY won't get you out of the Alaska bush YOU AREN'T COMING OUT EITHER <img src="/images/graemlins/wink.gif" alt="" />