I too like your blocks - Here is another vote for sashing - When I saw this this morning, I had EQ open. This is what I would do (I included a screen shot of EQ). I would set them onpoint with a grey or black sashing (maybe add soft yellow square to soften the harshness) add the yellow as the setting triangles and put a stripped border around the whole thing. I think they would be striking set that way!! You would need about 2 yards of each color to pull this off and you would not have to have the exact fabric in the blocks. pm me if you have any questions.