Sometimes no matter how many times I check, I still manage sew blocks upside down and just plain wrong. Fortunately, if I walk away, do something else, and come back, there it is. So I rip. Since I do all my piecing at guild, I am fortunate to have more than my eyes viewing my work -- and they never hold back -- and for that I am so grateful. Because for me, once I see an error, that is all I see when I look at my work. I have totally ripped out knitting because I could see nothing but an error. I don't ride horses and if I did, I doubt I would gallop past my work. I rip when I know I can do better, not when it is not perfect. By ripping I learn what my strengths and weaknesses are.