Okay, so step further in my project. Our darkroom here in the college really is only set up for 35mm film. I took in some 120 film that my grandfather had shot (50 years ago!), and was able to develop it, but the lens on the enlarger wasn't the right size, so I had to burn quite a bit around the edges to get the photo to look right. The Holga shoots 120 film, right? For the Holga users, where do you get your film developed? Can I drop that off at a Walmart or not? Do you develop your own? Is there any way to modify it to use 35mm film?