It makes no difference in your mistakes; I assure you every quilter; no matter who they are will have mistakes, some just take a little closer looking to find but they are there. (only God is Perfect). I usually turn one block backwards to remind me; I am not perfect; So no matter how hard I try--there will always be mistakes... Don't let anyone tell you they don't make mistakes; they do. Including the called professional ones! Enjoy yourself and play with your fabric and laugh at your mistakes--like the rest of us we are human; even some don't think so.