I am amazed at the precision in your sewing. How do you do that? I'm making a quilt right now with alternating nine patch blocks. I'm having a really difficult time keeping the strips the exact same width and the blocks precisely 9.5 X 9.5 after sewing the strips, cutting, and sewing into blocks. I have tried every imaginable trick but still come up anywere from 1/8 to 1/4 inch off. Suggestions?