I've owned my GW690 (model I) for a while now, and I really like it. It's not tiny, it's not huge, it feels right in my hands, and the Fujinon 90mm is a great lens. But I've noticed that the spacing between frames is uneven, varying between 7/16 of an inch and 1/4 of an inch, with the average a little over 5/16. When you're cutting up a strip of negatives, and you're trying to locate the exact middle of a 1/4 inch space... For those of you who own a camera in this series, is this normal, or is this something I should try to have fixed? TIA!