I just got a nice used Mamiya 7II and shot a few rolls today, developed them and went to cut them tonight and put in printfile pages and realized that I don't have any sufficient sleeves. What are the best pages for 6x7 negatives, without overlapping negatives? Also, when going to proof, I'm used to 12 6x6 frames fitting nicely onto an 8x10 piece of paper. How am I to get around this with 6x7? They call it the "ideal" format, but when it comes to filing and proofing kind of confusing.