So let's say I have a large contact-printing paper, say Azo in 20x24 or perhaps in the future the Lodima in that size. But all I've got to work with is a 4X5 neg. I've got some experience making enlarged negatives onto 8x10 Kodalith, but that's about it, and all that's readily available in 20x24 is APHS unless I want to enlarge onto pan film. What limitations and considerations are there in making an enlarged negative of this size? Thanks.