Go down to the office supply store and buy a few ordainary chrome plated paper clamps (Boston clip #2, for example). Then run over to the sporting goods store and buy a few 3 or 4 ounce lead fishing weights and some brass split rings.(posted 8082 days ago)With a split ring, attach a weight to a hole in the handle of a clamp... You'll never have 120 (or even 220) film swaying around again.