Block Alignment Tip
I'm working on a charity scrap quilt which will consist of 20 rows with each row made with twenty 2.5 inch squares. I sew two rows together, finger press the two rows apart, lay a metal yardstick along the seam between the two rows and the yardstick reveals whether I need to "nudge" the seam up or down to make the seam straight, then I remove the yardstick and iron press the two rows. Using the yardstick to check the seam eliminates any "row bowing". Then I sew a two row section to another two row section and I use the yardstick to check the seam between the two sections. Then I attach two four row sections You get the idea.
Am I telling you folks about something you discovered years ago?