Hey Doug,
The loop is pretty simple, I just punched two 1/2" slots aproximately 3/4" apart vertically on the front. I then skived each end of the loop stock and slipped one end into each slot. The attatchment is up to you, I riveted each end but you could also stitch it. As for compartments, there is a center divider with a stiffener in the middle. One side of the divider has 6 pen pockets, a 3 X 4 pocket and a business card pocket. I meant to take pics of the divider before assembly but of course I forgot!!