I have one of those projects. I got it back out today to work on it. I couldn't get a cornerstone in the sashing to match up. I ripped it our twice and I still wasn't pleased. I decided to try repressing and that seemed to make things match. Then I even put a tiny dab of washable glue to make sure those corners would stay matched. I am too obsessive compulsive about corners matching up. It is a chilly, rainy day and it is either sew or do some more catch up cleaning. My fur babies are all sleeping.