I just posted this on APUG but I figured I should post it on here as well in hopes of finding a quick and clear answer. Anyway, I've found some discussions that begin to touch on this but I cant find any directly relevant answers to these specific questions. As many of you know Fujifilm offers an instant black & white 4x5 film (Fujifilm FP-100B) that can be used in their Fujifilm pack film holders and which can supposedly be used in some Polaroid film holders. Is the film in the FP-100B pack individual like the old Polaroid instant 4x5 and can the film be used with a Polaroid 545i holder? I have heard good things (and some not so good) about the Fujifilm instant films and my intention is to use this film with a Speed Graphic press camera that I've recently acquired. The camera has a the simple spring back and I do not want to alter the camera. If possible I'd like to use the Fujifilm instant 4x5 film in either a Polaroid 545i film holder or a Fujifilm pack film holder. I have heard that the Fujifilm pack film holder is too thick to fit into the spring back of a press camera. Can someone who has had personal experience in the matter please confirm of refute this claim? Any help on how I can use the instant 4x5 film in a Speed Graphic (Pre-Anniversary) press camera would be very much appreciated. Thank you!