I'm gonna play devil's advocate here for you, no offense intended. That must be one big cargo pocket. All of that stuff in one cargo pocket? Of course I assume each kit listed is made for one cargo pocket, right? Otherwise you're gonna have a hard time convincing me short of pictures. A 25' X25' tarp in a cargo pocket must be pretty flimsy. What is it made out of? When considering making such a kit, you do have the military cargo strap built into these pants for the cargo pocket on each pants leg that you fasten around the pocket (and your thigh) to secure it to your leg, don't you? With all of that weight you can keep adding to a kit, you will need it to prevent chafing.
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Me, a vegetarian? My set of teeth came with canines.