I've been shooting a lot of 12 and 24 exposure rolls. Love 'em for testing new cameras and lenses. Sometimes I've tried to develop a 24 and a 12 on the same reel... but sometimes the film slips and rides over. No harm thus far but it could certainly cause problems. Is there a good way to develop a 12 and a 24 together on one reel? I usually have a another reel too, with a 36exp loaded, so both reels in my tank are in use.