It is worth noting, that even if a file has a certain paper size with it, you can change that. Now, it WILL change the orientation of the parts on the page,and require you to move them around to fit properly, but it can be done. I've downloaded many files that were A4 paper size, which I then converted to Letter. Most parts just require moving around. Occasionally, you may have the end of some larger pieces get cut off, but I was able to eyeball missing lines, or print the missing end on a whole new page, and overlay it with the other piece (you basically print two version of the same piece, but with opposite sides cut off of them. Then cut them out, line them up, and tape together, and BOOM, the whole piece is there.)