Yep...I had that kind of a day too. Yesterday I finished all of the piecing, sandwiched everything and started marking my quilt design...doing a grid pattern. I got half of it finished and started the other half when I got home from the lab...had to have bloodwork done before my doctor appointment on Monday. Started marking my lines and things were going smoothly. When I got too my last few lines...all of a sudden they were too close together. So...I got out my fabric eraser and started erasing those lines. That's as bad as ripping out seams. Finally I finished it but I had to walk away from it a few times. Yesterday it took me less than hour to mark the first half. Today I spent most of the afternoon marking and erasing. And this is a large wallhanging. I can't imagine doing a grid pattern on a bed size quilt.