Right now I've just got a stack of 3x4" negatives and am looking on suggestions on how to store these suckers since there aren't any negfile sheets that come in 3x4" that I can find. I thought about using the 4x5" sheets, but am afraid that if I trip while carrying the notebook then they'll all fly out! This may still be the best mix of organization and cost/value. Any thoughts? What do you other 3x4 shooter use?