Mistakes! You bet but you learn to live with them after a while. I made a matching bedroom set with curtains and bedspread. I took months outlining all the flowers on the bedspread and ripping out each time I goofed. Well months and months later it was off the frame and what did I find? You cannot see any of the quilting at all! I was just supposed to do edge to edge on this one and mistakes, not one shows up at all. So much for perfection.