Hello Rosemary,don't worry about perfection, your work is art ,and it's unique,there won't be another that is exactly the same in the world -- what an achievement ! I can't remember who first said it but I have often quoted it to people I have introduced to patchwork over the years,'' If you can ride a bicycle past your work and see the mistakes--then unpick them!
My quilts and wall hangings have many errors, but hey, I'm still working on perfection---the Lord will know when I'm ready. Love Letty.