Well, sitting down to mock this up, I figured one thing out... blocks of 2" each would sure make this a no brainer as far as the layout, especially if one were quilting the "grout".
I had just sat down to see what it looked like in a larger scale than my bathroom counter, and thought "both are divisible by 2... " I'm a little embarrassed that I didn't figure that out sooner. Each of the tiles are either 4" or 6".
Now, I think unless I can randomize the pattern more, I like it better in a small scale.
Here are the 3 versions I've managed to come up with:
Light:
[ATTACH=CONFIG]436281[/ATTACH]
Dark:
[ATTACH=CONFIG]436282[/ATTACH]
The original, as 10" square blocks and twisted:
[ATTACH=CONFIG]436283[/ATTACH]
Any thoughts on how to make this back into a design I'd want to use 13 yards of fabric for would be welcome.