Not yet. I had given it some thought though. I lashed the shelter materials with about 30' of paracord. Looks bulky, but it works for me for now. I managed to put foil, water purification, snare material, a good fish kit, sewing needle, paper clips, safety pins, fire tender, matches, keychain SAK, 2X2, bandaids, antimicrobial wipes, vicadin, advil, benedrill, imodium ad, multi vitamin, condom and a couple of other items in the tin and then wrapped it with duct tape to waterproof it. I'm still working on it though. There's room under the tin like you stated that will accomodate more gear and I noticed the room behind the insert. I'll be working on adding to it for differing circumstances and placing it into the handles. I havn't probed the earth with my becker either but that time will come I'm sure. I did some lite prying with it and hung a couple of pictures with it, lol.