I am working on this right now. I have been trying to find a pattern for a particular fabric and this is perfect. But, I understand your problem. Because of the bias, the pieces all come out slightly off - no matter how careful you are.
I love the picture of the blocks on point. This will solve the slightly off situation (hide it in the sashing/solid blocks). The solid blocks will also let the fussy cut centers really stand out. I LOVE THIS BLOG!!!