Some great ideas here. I've learned to measure my blocks when done and make them all the same size, or near to as possible, using the smallest measuring block as my new measurement. Now my question, does using different rulers on the same project really make a difference? I have a 6 1/2 inch by 24 1/2 inch ruler that I love because of the 6 1/2inch measurement. My Omnigrid is only 6 inches with no 1/2 inch after and I find that a pain. Of course, the 6 1/2 inch ruler I love is a different brand. As long as I have been quilting and quilting with my friends none of of us has heard about using the same brand of ruler through a whole project.