A while back I read the info & followed the links to making the sennet knot paracord keyfob, which is the version most of the military guys make.
While I was successful in making the fob, I had a realization: when properly made, the sennet knot fobs are woven/tied VERY tightly. If you don't make it tight, the knot doesn't form very well. But while testing the fob to see what it took to UNTIE (always test your gear at home in benign conditions!), I found that it is a major pain in the arse. It seemed to take almost as much effort and finger power to undo the sennet as to make it in the first place. Even the link that best described the knot said something like "...if you don't have worn grooves in your fingers after tying it, you haven't made it tight enough".
My conclusion: just make a semi-flat wad of 6' to 8' of paracord, looped lightly together, and carry it in your pocket as you would a folding knife or your keys. It seems to compress into a flat shape. Works for me, and the stuff is 1000% more accessible with 0.001% of the hassle. YMMV