Hi gang - So i *finally* got around to putting new light seals in my RB67 Pro-S 120 magazine. The process was much more involved than my 35mm Minoltas. Is there any way, other than experimenting with $ (film/developing/time), to check if i did a good sealing job? I am concerned about how well the 4 little "patches" in the corners of the film cassette are sealed as well as the lock-up side of the cassette door (the @$$@&$ narrow little channel under the slide lock). Thanks!