Hi all, I just got done contact printing a bunch of 12x20's for a quick coffeehouse exhibition. While I was putting them into frames at the last minute, I was thinking... these are kind of small, only 12x20...wouldnt 20x24 be that much better? Then I got thinking about a 20x24 camera and the contacts I could make with that! Well as I was hanging the exhibit this afternoon, right as I was finishing up someone called my name, and low and behold, there is a person I used to teach drums to 25 years ago, now grown up with a family etc. He didn't know I was into photography but liked the prints and better yet, mentioned that he had a bunch of photo stuff in his family print shop that he needed to get rid of and... did I want it? Needless to say I said I'll be right there and he proceded to show me the stuff. Well... there was my 20x24 camera...but man was it BIG. He had a room devoted to it as well as all the acoutrements, film, auto processors, contact paper, etc. I left with the 480mm Apo Nikkor.It had what looks like a modern type packard shutter behind the lens.My question is this...since I know absolutely nothing about the printing industry I dont know what is worthwhile to take in terms of film, contact paper, etc. Are any standard old technology printing shop materials applicable to todays B&W photography? There is the camera with vaccume back that I definately want... possibly to use for an enlarger or maybe to convert to a 20x24 indoor camera.Could the vaccume back be used for a contact printing frame? Has anyone here converted a camera of this type for personal use.Your help is most appreaciated! Thanks in advance!