[QUOTE=jnanian;1429191]. . . if you can find a copy of lester + morgan ( or lester + lester ) 's book graflex and graphic photography
buy it. the book is THE graflex photography book and will explain everything in great detail. . . . [QUOTE]

Yes, indeed. Get at least the 8th edition, the first one that covers the early Pacemaker series. Online booksellers usually have these.