I picked up a used Kodak Medalist I. Shutter is "stuck" so I wanted to open it up and have a look. I successfully cleaned and freed up the shutter on my Century Graflex so I thought I would give this a shot. However, I believe I am stuck right from the get go. I can't seem to get the front lens off! I'm assuming it should just unscrew but I have tried rubber pads and other ways to get a grip with no success. Am I missing something? Any tips?