if I see it while piecing the block I will make corrections or if I have a very unsquare quilt, but otherwise it depends on the intended use. If it's going into a show, yes--correction, if on a kids be,no. But keep in mind that I'm the quilter that had a class quilt that I named "Points? Points! We don't need no stinking points!" because it was a booger to piece and after fighting bad instructions, etc I decide it was good enough--and just did elaborate quilting!