for me, it usually depends on whether I determine the error will "come out in the quilting," as they say. I generally like to move forward, so long as the non-perfect section does not interfere with the appearance or workability of my quilt. I think, "okay... This can be my Amish Moment." (It's like my private EyeSpy quilt. lol...) My avatar was the first time I ever quilted (first two had been Tied.) It's loaded with errors that I didn't recognize at the time. I only saw the beauty. Thank goodness! (We surely can be our own worst critics... :-p )