Could I interest anyone in a double exposure round? The camera gets send around twice, same roll exposed twice. Overlap would be completely spontaneous and random.
Just a thought.
That is something I am experimenting now with my class. We are shooting out 35mm rolls, then I use a leader puller, pull it and reshoot it again. I set the cameras ISO setting to double the film box speed to halve the exposure so we dont get super dense negatives that cant print.