No matter how many pinwheel blocks I have made, I continue to have trouble with the center of the pinwheel laying flat. My 4 blocks are the correct measurement and I do press vs. iron. After joining, I press the two top blocks and the two bottom blocks to the dark. After sewing the top blocks to the bottom blocks, the center seam will not lie completely flat !! I generally press that seam open just to reduce the bulk, but it still has a slight rise in the center. I've tried a scant 1/4 inch on that seam, I've tried clipping a thread or two in the exact center (a tip from about.com), but still a problem. To spend a whole day trying to find a better way to construct a pinwheel has been frustrating!! Please, please...if anyone has a suggestion, I'm all ears.........
TIA, Georgia