I've been working with only 35mm and just recently i bought a Holga and an old Brownie target. I've never worked with 120 film but i managed to figure out how to load the cameras. I was just wondering if anyone knew where i can find good detailed instructions on how to develop 120 kodak TRI-X. Or if anyone has any tips i would greatly appreciate it. I'm pretty much clueless about 120. When i took the plastic off and unrolled some of the film, i kept expecting negatives with little square holes around the egdes to show up.