Grant,

"Gear creep" is always a temptation. That being said I would suggest considering adding a few things that might help others. A pair of Nitrile gloves pack small (I keep a pair in my AMK .3 FAK) and provide protection for you to render first aid (or for someone else to render you aid). Though it's container might be slightly larger than you want, a bottle of Skin Shield is great. It smells like airplane glue but works great on small cuts and blisters, waterproof too.

Others have mentioned in other posts using breast milk bags as spare water containers. They'd be smaller than the roll up water bags, I believe. Of course there's always non-lubricated condoms to hold water (you can carry a filled one in your bandana). A couple of water purfication tablets in foil don't take up much room either. Condom's don't take up much storage space.

Signaling and fire are also concerns. Not only do you want to see where you're going you also want to be seen. There are some small chemlites (under 2" long) that can used as markers (so no one runs you over from behind) and a signal mirror might be useful (thin too).

I'm working a wallet sized kit to fit in a case for Razor-sized phone. I'll post that list and pics when it's complete (lol, are they ever?)

Andy