joes mom - i do as all2pieces does...take out a few stitches...doesnt have to be all the way, just so you are able to open up the intersection...if you lay out all your sewn blocks so the pieced seams lay east/west...have the 1 big seam run north/south, then on each one at the intersection of the east west, just twirl the seam a little with your fingers, you will then see the seam start to come apart & you will get 4 small pieces drop out of the way & the block lays very flat...it takes a while, but it will happen...i just finished doing this to 75 blocks placed in a 4 patch pinwheel...really cuts down on the bulk in the center...clear as mud im sure...let me know if you need help, i w/try to explain better...