Harder Than it Looks

So I am trying to duplicate the repeat design I did in college and finding it rather tricky. (I can't quite figure out how I did it the first time.) I'm close, but the proportions don't look quite right. I'll get there eventually, because the idea of having fabric printed in the design is very appealing!

To all the Red Letter Quilt-Alongers... I've sewn up my letters into rows, and will post about that soon!