When I shoot 120 film, I have contact sheets made on 8.5x11" paper. The frames are in most cases large enough to be "readable". However, I find that it is a different story with 35mm negatives. The frames on the standard contact sheets are usually too small for me to make an accurate assessment of the negative. Unfortunately, making 4x6" proof prints of all frames is both costly and a waste of materials. I recently heard about "enlarged contact sheets" (either 11x14 or 16x20). I wonder how many of you resort to such enlarged contact sheets. Do you find that these offer any significant advantage over standard sized contacts? Lastly, how do you store these larger sheets? Thanks very much.