I know that some people have good results with pins or thread basting, I was not one of them. I always got wrinkles no matter how carefully I pinned until I switched to Hobbs 80/20 fusible batt. I have not had a wrinkle since and I've done a twin size quilt on my domestic sewing machine. I have picked up the 505 basting spray and I plan to try it also due the rave reviews on QB. I know Leah Day uses regular straight pins with the pin moor ends but I will not go back to pinning.