Quote Originally Posted by tryals15 View Post
Turns out the film holder I have is for film packs -- evidently not what I needed...
you can safely put that into the metal recycling bin. No film packs made any more.

film holders such as have been discussed are readily available. don't get confused by differences between "graflex" and "graphic" backs -- all 4 by 5 film holders sold today are for your camera unless someone specifically says they are for a "graflex" camera, but those are all more collectibles.