Great job with the black and white, see how much it helps?
There are two mediums that you can throw in with the darks, left column top, and right column second from the top.
You have a LOT of lights, and not too many darks. All together you have a LARGE selection, no idea how much actual yardage is there.
I personally would not use any of the mediums unless you need the yardage - in which case you are going to need more dark to balance it out (unless you want a light heavy log cabin, perhaps the one with wide and narrow strips?).
Does that make sense?
Can't wait to see it, I love scrappy log cabins.
What size strips do you plan to use?