Best be careful there, Menacing -- sheet film is like cocaine; it'll steal your life away. Next thing you know, you'll be lugging a 12x20 (inch) camera in your car and taking out a second mortgage for a box of film...
And that goes double with a Xenar in that format; you'll get negatives similar in size to 6x9 on 120, but the film flatness will put most 6x9 roll film cameras to shame. Focus with care (use an 8x loupe on the ground glass, assuming you got a ground glass), and you'll be able to print to mural size from those...