In the latest modification of my always changing and upgrading gear and carry system saga, I've switched from a huge Maxpedition 5x7x2 to an M2 waistpack by moving a few items into this back pocket pocket I just made. Pictured with the PD31, Knifeless Fuse, and CRKT Ripple I carry in it: I could have made it tighter and more closely formed, but I wanted to leave it flexible enough to switch out gear when I want to. The flashlight slot will also hold my Nitecore IFE2, or any other light of similar size. The multi-tool slot is a hair too narrow for my Surge, but will fit the Supertool 300. The knife slot is too small for the 710, but will fit a 94X. I made it 5"x5" so will fit in the back pocket of my pants, rounded the corners. As to comfort, that can't be comfortable to sit on, due to the shape of my butt and the way my pants fit me, the contents of my back pockets ride above my seat, so I'm not sitting on it. I used stiffer leather for the backing and thinner leather for the front. It certainly won't win any beauty contests, but it works very well for me. I used a #0 leather punch for the holes and then just laced it with some strong thread.