What will the dimensions of your finished quilt top be? Are they divisible by an even number in both length and width? E.g. If finished top dimensions are 55 x 66, it is divisible by 11 and 5 1/2" and 2 3/4". I would graph using the 5 1/2" logs (then add the 1/2" seam allowance) because I think you sounded like you wanted a big graphic statement and one block. Maybe I read you wrong. Sounds like a fun back.