I am always on the look out for smaller objects that save space. I think that there is a point of diminishing returns though. I have two PSK's. One backs the other up and each can stand alone. I have one like the one that everyone carries on this site and I have another like the one that Cody Lundin talks about in his book. And I actually prefer Cody's! If I get too small, my big clumsy fingers cause things to fall on the goround and be lost forever. This happened to me on a test run of my kit during a camping trip. But I am still hooked on the small stuff, so I personally look for things that are as small as I can get that are still big enough for my butter fingers to operate. Photon lites, boy scout hot sparks, scalples vs other blades, etc.
I also use smaller containers, like the ones you can buy at the container store and keep my smller items in a smaller container inside my PSK's. That way I minimize loss of gear.
For my Lundinesque kit, I didnt even bother with the smaller items. All of them are pretty much full size, but I only have the essentials in there. I have found i the past few days I have been spending in the desert, there are some things that I am missing, and need to put in there, but I havent needed to use the kits for their intended purpose.
I dont think I have answered your question, but I hope I gave you some ideas. Let me know. I am little sick in the head right now, and I am not in my right mind all the time.
Garrett
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On occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. - Epictetus